139131265 has 16 divisors (see below), whose sum is σ = 205486848. Its totient is φ = 88065216.

The previous prime is 139131259. The next prime is 139131269. The reversal of 139131265 is 562131931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 139131265 - 2³ = 139131257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139131269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152437 + ... + 153346.

It is an arithmetic number, because the mean of its divisors is an integer number (12842928).

Almost surely, 2^139131265 is an apocalyptic number.

It is an amenable number.

139131265 is a deficient number, since it is larger than the sum of its proper divisors (66355583).

139131265 is a wasteful number, since it uses less digits than its factorization.

139131265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305808.

The product of its digits is 4860, while the sum is 31.

The square root of 139131265 is about 11795.3916848912. The cubic root of 139131265 is about 518.1731568313.

The spelling of 139131265 in words is "one hundred thirty-nine million, one hundred thirty-one thousand, two hundred sixty-five".