42756057 has 12 divisors (see below), whose sum is σ = 64444224. Its totient is φ = 27264600.

The previous prime is 42756047. The next prime is 42756067. The reversal of 42756057 is 75065724.

42756057 is a `hidden beast` number, since 42 + 7 + 5 + 605 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (42756047) and next prime (42756067).

It is not a de Polignac number, because 42756057 - 2¹⁰ = 42755033 is a prime.

It is a super-4 number, since 4×42756057⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (42756047) 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, 103069 + ... + 103482.

It is an arithmetic number, because the mean of its divisors is an integer number (5370352).

Almost surely, 2^42756057 is an apocalyptic number.

It is an amenable number.

42756057 is a deficient number, since it is larger than the sum of its proper divisors (21688167).

42756057 is a wasteful number, since it uses less digits than its factorization.

42756057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206580 (or 206577 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 42756057 is about 6538.8115892722. The cubic root of 42756057 is about 349.6760458241.

The spelling of 42756057 in words is "forty-two million, seven hundred fifty-six thousand, fifty-seven".