13725431 has 2 divisors, whose sum is σ = 13725432. Its totient is φ = 13725430.

The previous prime is 13725401. The next prime is 13725449. The reversal of 13725431 is 13452731.

It is a strong prime.

It is an emirp because it is prime and its reverse (13452731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13725431 - 2¹⁸ = 13463287 is a prime.

It is a super-2 number, since 2×13725431² = 376774912271522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13725431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13725401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6862715 + 6862716.

It is an arithmetic number, because the mean of its divisors is an integer number (6862716).

Almost surely, 2^13725431 is an apocalyptic number.

13725431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13725431 is an equidigital number, since it uses as much as digits as its factorization.

13725431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 13725431 is about 3704.7848790449. The cubic root of 13725431 is about 239.4282163927.

The spelling of 13725431 in words is "thirteen million, seven hundred twenty-five thousand, four hundred thirty-one".