671224257 has 24 divisors (see below), whose sum is σ = 1063827648. Its totient is φ = 404440800.

The previous prime is 671224241. The next prime is 671224259. The reversal of 671224257 is 752422176.

It is a happy number.

It is not a de Polignac number, because 671224257 - 2⁴ = 671224241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671224259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2469 + ... + 36722.

It is an arithmetic number, because the mean of its divisors is an integer number (44326152).

Almost surely, 2^671224257 is an apocalyptic number.

It is an amenable number.

671224257 is a deficient number, since it is larger than the sum of its proper divisors (392603391).

671224257 is a wasteful number, since it uses less digits than its factorization.

671224257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39381 (or 39378 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 671224257 is about 25907.9960050946. The cubic root of 671224257 is about 875.5666564057.

The spelling of 671224257 in words is "six hundred seventy-one million, two hundred twenty-four thousand, two hundred fifty-seven".