161188125 has 40 divisors (see below), whose sum is σ = 306951744. Its totient is φ = 73680000.

The previous prime is 161188109. The next prime is 161188129. The reversal of 161188125 is 521881161.

161188125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161188125 - 2⁴ = 161188109 is a prime.

It is a super-2 number, since 2×161188125² = 51963223282031250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161188129) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6985 + ... + 19265.

Almost surely, 2^161188125 is an apocalyptic number.

161188125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161188125 is a deficient number, since it is larger than the sum of its proper divisors (145763619).

161188125 is an equidigital number, since it uses as much as digits as its factorization.

161188125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12311 (or 12296 counting only the distinct ones).

The product of its digits is 3840, while the sum is 33.

The square root of 161188125 is about 12695.9885396924. The cubic root of 161188125 is about 544.2239888688.

The spelling of 161188125 in words is "one hundred sixty-one million, one hundred eighty-eight thousand, one hundred twenty-five".