15625004 has 12 divisors (see below), whose sum is σ = 28532784. Its totient is φ = 7472784.

The previous prime is 15624979. The next prime is 15625007. The reversal of 15625004 is 40052651.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (15625007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84827 + ... + 85010.

It is an arithmetic number, because the mean of its divisors is an integer number (2377732).

Almost surely, 2^15625004 is an apocalyptic number.

It is an amenable number.

15625004 is a deficient number, since it is larger than the sum of its proper divisors (12907780).

15625004 is a wasteful number, since it uses less digits than its factorization.

15625004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169864 (or 169862 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 15625004 is about 3952.8475811749. The cubic root of 15625004 is about 250.0000213333. Note that the first 4 decimals are identical.

Adding to 15625004 its reverse (40052651), we get a palindrome (55677655).

It can be divided in two parts, 1562500 and 4, that multiplied together give a 4-th power (6250000 = 50⁴).

The spelling of 15625004 in words is "fifteen million, six hundred twenty-five thousand, four".