42123712 has 28 divisors (see below), whose sum is σ = 84079080. Its totient is φ = 20938496.

The previous prime is 42123691. The next prime is 42123721. The reversal of 42123712 is 21732124.

It is a super-2 number, since 2×42123712² = 3548814225317888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9618 + ... + 13294.

Almost surely, 2^42123712 is an apocalyptic number.

It is an amenable number.

42123712 is a deficient number, since it is larger than the sum of its proper divisors (41955368).

42123712 is a wasteful number, since it uses less digits than its factorization.

42123712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868 (or 3858 counting only the distinct ones).

The product of its digits is 672, while the sum is 22.

The square root of 42123712 is about 6490.2782683025. The cubic root of 42123712 is about 347.9436205842.

Adding to 42123712 its reverse (21732124), we get a palindrome (63855836).

The spelling of 42123712 in words is "forty-two million, one hundred twenty-three thousand, seven hundred twelve".