42017138 has 8 divisors (see below), whose sum is σ = 63104940. Its totient is φ = 20982160.

The previous prime is 42017137. The next prime is 42017141. The reversal of 42017138 is 83171024.

It can be written as a sum of positive squares in 2 ways, for example, as 41434969 + 582169 = 6437^2 + 763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42017138² = 3530879771422088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42017137) 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, 11153 + ... + 14436.

Almost surely, 2^42017138 is an apocalyptic number.

42017138 is a deficient number, since it is larger than the sum of its proper divisors (21087802).

42017138 is a wasteful number, since it uses less digits than its factorization.

42017138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26412.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 42017138 is about 6482.0627889585. The cubic root of 42017138 is about 347.6499375392.

The spelling of 42017138 in words is "forty-two million, seventeen thousand, one hundred thirty-eight".