42115057 has 4 divisors (see below), whose sum is σ = 42228340. Its totient is φ = 42001776.

The previous prime is 42115049. The next prime is 42115079. The reversal of 42115057 is 75051124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15085456 + 27029601 = 3884^2 + 5199^2 .

It is a cyclic number.

It is not a de Polignac number, because 42115057 - 2³ = 42115049 is a prime.

It is a super-2 number, since 2×42115057² = 3547356052226498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42115027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56082 + ... + 56827.

It is an arithmetic number, because the mean of its divisors is an integer number (10557085).

Almost surely, 2^42115057 is an apocalyptic number.

It is an amenable number.

42115057 is a deficient number, since it is larger than the sum of its proper divisors (113283).

42115057 is a wasteful number, since it uses less digits than its factorization.

42115057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113282.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 42115057 is about 6489.6114675688. The cubic root of 42115057 is about 347.9197887314.

The spelling of 42115057 in words is "forty-two million, one hundred fifteen thousand, fifty-seven".