8139625 has 16 divisors (see below), whose sum is σ = 10941840. Its totient is φ = 6009600.

The previous prime is 8139611. The next prime is 8139641. The reversal of 8139625 is 5269318.

It can be written as a sum of positive squares in 8 ways, for example, as 4309776 + 3829849 = 2076^2 + 1957^2 .

It is not a de Polignac number, because 8139625 - 2⁷ = 8139497 is a prime.

It is an unprimeable number.

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, 880 + ... + 4129.

It is an arithmetic number, because the mean of its divisors is an integer number (683865).

Almost surely, 2^8139625 is an apocalyptic number.

It is an amenable number.

8139625 is a deficient number, since it is larger than the sum of its proper divisors (2802215).

8139625 is a wasteful number, since it uses less digits than its factorization.

8139625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037 (or 5027 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 8139625 is about 2853.0028040645. The cubic root of 8139625 is about 201.1568374014.

The spelling of 8139625 in words is "eight million, one hundred thirty-nine thousand, six hundred twenty-five".