42897957 has 4 divisors (see below), whose sum is σ = 57197280. Its totient is φ = 28598636.

The previous prime is 42897941. The next prime is 42897977. The reversal of 42897957 is 75979824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42897957 - 2⁴ = 42897941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42897937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7149657 + ... + 7149662.

It is an arithmetic number, because the mean of its divisors is an integer number (14299320).

Almost surely, 2^42897957 is an apocalyptic number.

It is an amenable number.

42897957 is a deficient number, since it is larger than the sum of its proper divisors (14299323).

42897957 is a wasteful number, since it uses less digits than its factorization.

42897957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14299322.

The product of its digits is 1270080, while the sum is 51.

The square root of 42897957 is about 6549.6531969258. The cubic root of 42897957 is about 350.0624568812.

It can be divided in two parts, 4289 and 7957, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 42897957 in words is "forty-two million, eight hundred ninety-seven thousand, nine hundred fifty-seven".