42072057 has 6 divisors (see below), whose sum is σ = 60770762. Its totient is φ = 28048032.

The previous prime is 42072049. The next prime is 42072067. The reversal of 42072057 is 75027024.

It can be written as a sum of positive squares in only one way, i.e., 40717161 + 1354896 = 6381^2 + 1164^2 .

It is not a de Polignac number, because 42072057 - 2³ = 42072049 is a prime.

It is a super-2 number, since 2×42072057² = 3540115960422498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42072057.

It is not an unprimeable number, because it can be changed into a prime (42072067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2337328 + ... + 2337345.

Almost surely, 2^42072057 is an apocalyptic number.

It is an amenable number.

42072057 is a deficient number, since it is larger than the sum of its proper divisors (18698705).

42072057 is a wasteful number, since it uses less digits than its factorization.

42072057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674679 (or 4674676 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 42072057 is about 6486.2976342441. The cubic root of 42072057 is about 347.8013382570.

The spelling of 42072057 in words is "forty-two million, seventy-two thousand, fifty-seven".