161796125 has 8 divisors (see below), whose sum is σ = 201921720. Its totient is φ = 129436800.

The previous prime is 161796119. The next prime is 161796163. The reversal of 161796125 is 521697161.

It can be written as a sum of positive squares in 4 ways, for example, as 3363556 + 158432569 = 1834^2 + 12587^2 .

It is not a de Polignac number, because 161796125 - 2⁴ = 161796109 is a prime.

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, 647060 + ... + 647309.

It is an arithmetic number, because the mean of its divisors is an integer number (25240215).

Almost surely, 2^161796125 is an apocalyptic number.

It is an amenable number.

161796125 is a deficient number, since it is larger than the sum of its proper divisors (40125595).

161796125 is an equidigital number, since it uses as much as digits as its factorization.

161796125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294384 (or 1294374 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 161796125 is about 12719.9105735850. The cubic root of 161796125 is about 544.9073994679.

The spelling of 161796125 in words is "one hundred sixty-one million, seven hundred ninety-six thousand, one hundred twenty-five".