42158915 has 16 divisors (see below), whose sum is σ = 52759296. Its totient is φ = 32304000.

The previous prime is 42158899. The next prime is 42158923. The reversal of 42158915 is 51985124.

It is not a de Polignac number, because 42158915 - 2⁴ = 42158899 is a prime.

It is a super-2 number, since 2×42158915² = 3554748227954450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14309 + ... + 17001.

It is an arithmetic number, because the mean of its divisors is an integer number (3297456).

Almost surely, 2^42158915 is an apocalyptic number.

42158915 is a deficient number, since it is larger than the sum of its proper divisors (10600381).

42158915 is a wasteful number, since it uses less digits than its factorization.

42158915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830.

The product of its digits is 14400, while the sum is 35.

The square root of 42158915 is about 6492.9896811869. The cubic root of 42158915 is about 348.0405196796.

The spelling of 42158915 in words is "forty-two million, one hundred fifty-eight thousand, nine hundred fifteen".