139805625 has 40 divisors (see below), whose sum is σ = 234824832. Its totient is φ = 73960000.

The previous prime is 139805621. The next prime is 139805641. The reversal of 139805625 is 526508931.

It is not a de Polignac number, because 139805625 - 2² = 139805621 is a prime.

It is a super-2 number, since 2×139805625² = 39091225563281250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139805621) 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 39 ways as a sum of consecutive naturals, for example, 324160 + ... + 324590.

Almost surely, 2^139805625 is an apocalyptic number.

139805625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139805625 is a deficient number, since it is larger than the sum of its proper divisors (95019207).

139805625 is an equidigital number, since it uses as much as digits as its factorization.

139805625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 139805625 is about 11823.9428702950. The cubic root of 139805625 is about 519.0089914948.

The spelling of 139805625 in words is "one hundred thirty-nine million, eight hundred five thousand, six hundred twenty-five".