42456231 has 22 divisors (see below), whose sum is σ = 63772560. Its totient is φ = 28264788.

The previous prime is 42456187. The next prime is 42456251. The reversal of 42456231 is 13265424.

42456231 is a `hidden beast` number, since 424 + 5 + 6 + 231 = 666.

It is not a de Polignac number, because 42456231 - 2¹³ = 42448039 is a prime.

It is a super-2 number, since 2×42456231² = 3605063101450722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42456195 and 42456204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42456251) by changing a digit.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 58690 + ... + 59408.

Almost surely, 2^42456231 is an apocalyptic number.

42456231 is a deficient number, since it is larger than the sum of its proper divisors (21316329).

42456231 is an frugal number, since it uses more digits than its factorization.

42456231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 722 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 42456231 is about 6515.8446114069. The cubic root of 42456231 is about 348.8567623189.

The spelling of 42456231 in words is "forty-two million, four hundred fifty-six thousand, two hundred thirty-one".