159390625 has 21 divisors (see below), whose sum is σ = 201227893. Its totient is φ = 126250000.

The previous prime is 159390619. The next prime is 159390631. The reversal of 159390625 is 526093951.

It is a happy number.

The square root of 159390625 is 12625.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (159390619) and next prime (159390631).

It can be written as a sum of positive squares in 10 ways, for example, as 155326369 + 4064256 = 12463^2 + 2016^2 .

It is a de Polignac number, because none of the positive numbers 2^k-159390625 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 1578075 + ... + 1578175.

Almost surely, 2^159390625 is an apocalyptic number.

159390625 is the 12625-th square number.

159390625 is the 6313-rd centered octagonal number.

It is an amenable number.

159390625 is a deficient number, since it is larger than the sum of its proper divisors (41837268).

159390625 is an frugal number, since it uses more digits than its factorization.

159390625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 40.

The cubic root of 159390625 is about 542.1934388944.

Multiplying 159390625 by its product of nonzero digits (72900), we get a square (11619576562500 = 3408750²).

The spelling of 159390625 in words is "one hundred fifty-nine million, three hundred ninety thousand, six hundred twenty-five".