15489625 has 16 divisors (see below), whose sum is σ = 20002320. Its totient is φ = 11961600.

The previous prime is 15489623. The next prime is 15489629. The reversal of 15489625 is 52698451.

It can be written as a sum of positive squares in 8 ways, for example, as 6615184 + 8874441 = 2572^2 + 2979^2 .

It is not a de Polignac number, because 15489625 - 2¹ = 15489623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15489623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1489 + ... + 5761.

It is an arithmetic number, because the mean of its divisors is an integer number (1250145).

Almost surely, 2^15489625 is an apocalyptic number.

It is an amenable number.

15489625 is a deficient number, since it is larger than the sum of its proper divisors (4512695).

15489625 is an equidigital number, since it uses as much as digits as its factorization.

15489625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317 (or 4307 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 15489625 is about 3935.6860901246. The cubic root of 15489625 is about 249.2759047692.

The spelling of 15489625 in words is "fifteen million, four hundred eighty-nine thousand, six hundred twenty-five".