27423 is a member of OEIS A178919: smallest of three consecutive integers divisible respectively by three consecutive squares greater than 1 (here 9, 16 and 25). The inital members are 2223, 5823, 9423, 13023, 16623, 20223, 23823, 27423, 31023, 32975, 34623, 38223, ...

See blog post Divisibility Sequences.

27423 is a happy number.

27423 is a junction number because it is equal to n + sod(n) for n = 27396 and 27405.

27423 can be written as a digit equation as follows:

2 + 7 = 4 + 2 + 3

27423 stabilises after about 75 generations to four still life blocks.