861274172 has 24 divisors (see below), whose sum is σ = 1656813312. Its totient is φ = 388497200.

The previous prime is 861274159. The next prime is 861274181. The reversal of 861274172 is 271472168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68948 + ... + 80475.

It is an arithmetic number, because the mean of its divisors is an integer number (69033888).

Almost surely, 2^861274172 is an apocalyptic number.

It is an amenable number.

861274172 is a deficient number, since it is larger than the sum of its proper divisors (795539140).

861274172 is a wasteful number, since it uses less digits than its factorization.

861274172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149569 (or 149567 counting only the distinct ones).

The product of its digits is 37632, while the sum is 38.

The square root of 861274172 is about 29347.4730087618. The cubic root of 861274172 is about 951.4379597419.

The spelling of 861274172 in words is "eight hundred sixty-one million, two hundred seventy-four thousand, one hundred seventy-two".