15625161 has 12 divisors (see below), whose sum is σ = 22605492. Its totient is φ = 10400256.

The previous prime is 15625157. The next prime is 15625177. The reversal of 15625161 is 16152651.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11799225 + 3825936 = 3435^2 + 1956^2 .

It is not a de Polignac number, because 15625161 - 2² = 15625157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15625121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7905 + ... + 9681.

It is an arithmetic number, because the mean of its divisors is an integer number (1883791).

Almost surely, 2^15625161 is an apocalyptic number.

It is an amenable number.

15625161 is a deficient number, since it is larger than the sum of its proper divisors (6980331).

15625161 is a wasteful number, since it uses less digits than its factorization.

15625161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760 (or 2757 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 15625161 is about 3952.8674402261. The cubic root of 15625161 is about 250.0008586637. Note that the first 3 decimals are identical.

The spelling of 15625161 in words is "fifteen million, six hundred twenty-five thousand, one hundred sixty-one".