42957057 has 24 divisors (see below), whose sum is σ = 67806592. Its totient is φ = 24029280.

The previous prime is 42957049. The next prime is 42957071. The reversal of 42957057 is 75075924.

It is not a de Polignac number, because 42957057 - 2³ = 42957049 is a prime.

It is a super-2 number, since 2×42957057² = 3690617492202498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42957557) 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, 168 + ... + 9270.

Almost surely, 2^42957057 is an apocalyptic number.

It is an amenable number.

42957057 is a deficient number, since it is larger than the sum of its proper divisors (24849535).

42957057 is a wasteful number, since it uses less digits than its factorization.

42957057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9141 (or 9130 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 42957057 is about 6554.1633333325. The cubic root of 42957057 is about 350.2231420596.

The spelling of 42957057 in words is "forty-two million, nine hundred fifty-seven thousand, fifty-seven".