13139725 has 24 divisors (see below), whose sum is σ = 17677440. Its totient is φ = 9649920.

The previous prime is 13139723. The next prime is 13139741. The reversal of 13139725 is 52793131.

It is not a de Polignac number, because 13139725 - 2¹ = 13139723 is a prime.

It is a super-3 number, since 3×13139725³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13139723) 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 23 ways as a sum of consecutive naturals, for example, 17916 + ... + 18634.

It is an arithmetic number, because the mean of its divisors is an integer number (736560).

Almost surely, 2^13139725 is an apocalyptic number.

It is an amenable number.

13139725 is a deficient number, since it is larger than the sum of its proper divisors (4537715).

13139725 is a wasteful number, since it uses less digits than its factorization.

13139725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 784 counting only the distinct ones).

The product of its digits is 5670, while the sum is 31.

The square root of 13139725 is about 3624.8758599433. The cubic root of 13139725 is about 235.9728794364.

The spelling of 13139725 in words is "thirteen million, one hundred thirty-nine thousand, seven hundred twenty-five".