671142945 has 32 divisors (see below), whose sum is σ = 1173306240. Its totient is φ = 324887040.

The previous prime is 671142931. The next prime is 671142971. The reversal of 671142945 is 549241176.

It is not a de Polignac number, because 671142945 - 2²⁴ = 654365729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114117 + ... + 119853.

It is an arithmetic number, because the mean of its divisors is an integer number (36665820).

Almost surely, 2^671142945 is an apocalyptic number.

It is an amenable number.

671142945 is a deficient number, since it is larger than the sum of its proper divisors (502163295).

671142945 is a wasteful number, since it uses less digits than its factorization.

671142945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6465.

The product of its digits is 60480, while the sum is 39.

The square root of 671142945 is about 25906.4267123044. The cubic root of 671142945 is about 875.5312996427.

The spelling of 671142945 in words is "six hundred seventy-one million, one hundred forty-two thousand, nine hundred forty-five".