42056642 has 16 divisors (see below), whose sum is σ = 64970880. Its totient is φ = 20402928.

The previous prime is 42056629. The next prime is 42056653. The reversal of 42056642 is 24665024.

It is a super-2 number, since 2×42056642² = 3537522272632328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39959 + ... + 40997.

It is an arithmetic number, because the mean of its divisors is an integer number (4060680).

Almost surely, 2^42056642 is an apocalyptic number.

42056642 is a deficient number, since it is larger than the sum of its proper divisors (22914238).

42056642 is a wasteful number, since it uses less digits than its factorization.

42056642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 42056642 is about 6485.1092512000. The cubic root of 42056642 is about 347.7588554871.

The spelling of 42056642 in words is "forty-two million, fifty-six thousand, six hundred forty-two".