161925120 has 288 divisors, whose sum is σ = 643930560. Its totient is φ = 36864000.

The previous prime is 161925109. The next prime is 161925149. The reversal of 161925120 is 21529161.

161925120 is a `hidden beast` number, since 1 + 61 + 92 + 512 + 0 = 666.

161925120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644995 + ... + 645245.

It is an arithmetic number, because the mean of its divisors is an integer number (2235870).

Almost surely, 2^161925120 is an apocalyptic number.

161925120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161925120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321965280).

161925120 is an abundant number, since it is smaller than the sum of its proper divisors (482005440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161925120 is a wasteful number, since it uses less digits than its factorization.

161925120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 161925120 is about 12724.9801571555. The cubic root of 161925120 is about 545.0521735536.

It can be divided in two parts, 16192 and 5120, that added together give a palindrome (21312).

The spelling of 161925120 in words is "one hundred sixty-one million, nine hundred twenty-five thousand, one hundred twenty".