13725439 has 24 divisors (see below), whose sum is σ = 17811360. Its totient is φ = 10471104.

The previous prime is 13725431. The next prime is 13725449. The reversal of 13725439 is 93452731.

It is not a de Polignac number, because 13725439 - 2³ = 13725431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13725431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18102 + ... + 18844.

It is an arithmetic number, because the mean of its divisors is an integer number (742140).

Almost surely, 2^13725439 is an apocalyptic number.

13725439 is a deficient number, since it is larger than the sum of its proper divisors (4085921).

13725439 is a wasteful number, since it uses less digits than its factorization.

13725439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 792 counting only the distinct ones).

The product of its digits is 22680, while the sum is 34.

The square root of 13725439 is about 3704.7859587296. The cubic root of 13725439 is about 239.4282629104.

The spelling of 13725439 in words is "thirteen million, seven hundred twenty-five thousand, four hundred thirty-nine".