161251204 has 24 divisors (see below), whose sum is σ = 289372160. Its totient is φ = 78581664.

The previous prime is 161251169. The next prime is 161251241. The reversal of 161251204 is 402152161.

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, 125437 + ... + 126715.

Almost surely, 2^161251204 is an apocalyptic number.

It is an amenable number.

161251204 is a deficient number, since it is larger than the sum of its proper divisors (128120956).

161251204 is a wasteful number, since it uses less digits than its factorization.

161251204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059 (or 2057 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 161251204 is about 12698.4725065655. The cubic root of 161251204 is about 544.2949714094.

The spelling of 161251204 in words is "one hundred sixty-one million, two hundred fifty-one thousand, two hundred four".