15252561 has 6 divisors (see below), whose sum is σ = 22031490. Its totient is φ = 10168368.

The previous prime is 15252551. The next prime is 15252563. The reversal of 15252561 is 16525251.

15252561 is a `hidden beast` number, since 1 + 52 + 52 + 561 = 666.

15252561 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9492561 + 5760000 = 3081^2 + 2400^2 .

It is not a de Polignac number, because 15252561 - 2²³ = 6863953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15252563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 847356 + ... + 847373.

It is an arithmetic number, because the mean of its divisors is an integer number (3671915).

Almost surely, 2^15252561 is an apocalyptic number.

It is an amenable number.

15252561 is a deficient number, since it is larger than the sum of its proper divisors (6778929).

15252561 is a wasteful number, since it uses less digits than its factorization.

15252561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694735 (or 1694732 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 15252561 is about 3905.4527266375. The cubic root of 15252561 is about 247.9976640866.

The spelling of 15252561 in words is "fifteen million, two hundred fifty-two thousand, five hundred sixty-one".