42997171 has 16 divisors (see below), whose sum is σ = 51923200. Its totient is φ = 34782048.

The previous prime is 42997159. The next prime is 42997177. The reversal of 42997171 is 17179924.

It is not a de Polignac number, because 42997171 - 2⁵ = 42997139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42997177) by changing a digit.

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, 49981 + ... + 50833.

It is an arithmetic number, because the mean of its divisors is an integer number (3245200).

Almost surely, 2^42997171 is an apocalyptic number.

42997171 is a deficient number, since it is larger than the sum of its proper divisors (8926029).

42997171 is a wasteful number, since it uses less digits than its factorization.

42997171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258.

The product of its digits is 31752, while the sum is 40.

The square root of 42997171 is about 6557.2228115262. Note that the first 3 decimals coincide. The cubic root of 42997171 is about 350.3321228368.

The spelling of 42997171 in words is "forty-two million, nine hundred ninety-seven thousand, one hundred seventy-one".