139307625 has 24 divisors (see below), whose sum is σ = 251127240. Its totient is φ = 74296800.

The previous prime is 139307587. The next prime is 139307653. The reversal of 139307625 is 526703931.

It can be written as a sum of positive squares in 4 ways, for example, as 5419584 + 133888041 = 2328^2 + 11571^2 .

It is not a de Polignac number, because 139307625 - 2⁸ = 139307369 is a prime.

It is a super-2 number, since 2×139307625² = 38813228766281250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 139307625.

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 23 ways as a sum of consecutive naturals, for example, 60790 + ... + 63039.

It is an arithmetic number, because the mean of its divisors is an integer number (10463635).

Almost surely, 2^139307625 is an apocalyptic number.

139307625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139307625 is a deficient number, since it is larger than the sum of its proper divisors (111819615).

139307625 is a wasteful number, since it uses less digits than its factorization.

139307625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123850 (or 123837 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 139307625 is about 11802.8651182668. The cubic root of 139307625 is about 518.3920063532.

The spelling of 139307625 in words is "one hundred thirty-nine million, three hundred seven thousand, six hundred twenty-five".