161682925 has 6 divisors (see below), whose sum is σ = 200486858. Its totient is φ = 129346320.

The previous prime is 161682919. The next prime is 161682943. The reversal of 161682925 is 529286161.

It can be written as a sum of positive squares in 3 ways, for example, as 2064969 + 159617956 = 1437^2 + 12634^2 .

It is not a de Polignac number, because 161682925 - 2²⁵ = 128128493 is a prime.

It is a super-2 number, since 2×161682925² = 52282736473111250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3233634 + ... + 3233683.

Almost surely, 2^161682925 is an apocalyptic number.

It is an amenable number.

161682925 is a deficient number, since it is larger than the sum of its proper divisors (38803933).

161682925 is an equidigital number, since it uses as much as digits as its factorization.

161682925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6467327 (or 6467322 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 161682925 is about 12715.4600781883. The cubic root of 161682925 is about 544.7802890715.

The spelling of 161682925 in words is "one hundred sixty-one million, six hundred eighty-two thousand, nine hundred twenty-five".