42256131 has 12 divisors (see below), whose sum is σ = 58221576. Its totient is φ = 27260160.

The previous prime is 42256121. The next prime is 42256141. The reversal of 42256131 is 13165224.

It is an interprime number because it is at equal distance from previous prime (42256121) and next prime (42256141).

It is not a de Polignac number, because 42256131 - 2⁷ = 42256003 is a prime.

It is a super-2 number, since 2×42256131² = 3571161214178322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42256111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4446 + ... + 10211.

It is an arithmetic number, because the mean of its divisors is an integer number (4851798).

Almost surely, 2^42256131 is an apocalyptic number.

42256131 is a deficient number, since it is larger than the sum of its proper divisors (15965445).

42256131 is a wasteful number, since it uses less digits than its factorization.

42256131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14722 (or 14691 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 42256131 is about 6500.4715982765. The cubic root of 42256131 is about 348.3078346961.

The spelling of 42256131 in words is "forty-two million, two hundred fifty-six thousand, one hundred thirty-one".