42251157 has 24 divisors (see below), whose sum is σ = 65983008. Its totient is φ = 25898400.

The previous prime is 42251149. The next prime is 42251179. The reversal of 42251157 is 75115224.

It is not a de Polignac number, because 42251157 - 2³ = 42251149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42251157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38182 + ... + 39272.

It is an arithmetic number, because the mean of its divisors is an integer number (2749292).

Almost surely, 2^42251157 is an apocalyptic number.

It is an amenable number.

42251157 is a deficient number, since it is larger than the sum of its proper divisors (23731851).

42251157 is a wasteful number, since it uses less digits than its factorization.

42251157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441 (or 1438 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 42251157 is about 6500.0889993907. The cubic root of 42251157 is about 348.2941676367.

The spelling of 42251157 in words is "forty-two million, two hundred fifty-one thousand, one hundred fifty-seven".