42175161 has 20 divisors (see below), whose sum is σ = 72003712. Its totient is φ = 24099768.

The previous prime is 42175157. The next prime is 42175171. The reversal of 42175161 is 16157124.

It is a happy number.

It is not a de Polignac number, because 42175161 - 2² = 42175157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42175141) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36625 + ... + 37758.

Almost surely, 2^42175161 is an apocalyptic number.

It is an amenable number.

42175161 is a deficient number, since it is larger than the sum of its proper divisors (29828551).

42175161 is an equidigital number, since it uses as much as digits as its factorization.

42175161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74402 (or 74393 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 42175161 is about 6494.2406022567. The cubic root of 42175161 is about 348.0852199140.

The spelling of 42175161 in words is "forty-two million, one hundred seventy-five thousand, one hundred sixty-one".