42256137 has 16 divisors (see below), whose sum is σ = 70244352. Its totient is φ = 21951120.

The previous prime is 42256121. The next prime is 42256141. The reversal of 42256137 is 73165224.

It is not a de Polignac number, because 42256137 - 2⁴ = 42256121 is a prime.

It is a super-2 number, since 2×42256137² = 3571162228325538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42256157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91233 + ... + 91694.

It is an arithmetic number, because the mean of its divisors is an integer number (4390272).

Almost surely, 2^42256137 is an apocalyptic number.

It is an amenable number.

42256137 is a deficient number, since it is larger than the sum of its proper divisors (27988215).

42256137 is a wasteful number, since it uses less digits than its factorization.

42256137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182948.

The product of its digits is 10080, while the sum is 30.

The square root of 42256137 is about 6500.4720597815. The cubic root of 42256137 is about 348.3078511816.

The spelling of 42256137 in words is "forty-two million, two hundred fifty-six thousand, one hundred thirty-seven".