13245731 has 2 divisors, whose sum is σ = 13245732. Its totient is φ = 13245730.

The previous prime is 13245709. The next prime is 13245809. The reversal of 13245731 is 13754231.

It is a weak prime.

It is an emirp because it is prime and its reverse (13754231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13245731 is a prime.

It is a super-2 number, since 2×13245731² = 350898779448722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13245731.

It is not a weakly prime, because it can be changed into another prime (13245031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6622865 + 6622866.

It is an arithmetic number, because the mean of its divisors is an integer number (6622866).

Almost surely, 2^13245731 is an apocalyptic number.

13245731 is a deficient number, since it is larger than the sum of its proper divisors (1).

13245731 is an equidigital number, since it uses as much as digits as its factorization.

13245731 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13245731 is about 3639.4685051529. The cubic root of 13245731 is about 236.6057585332.

Adding to 13245731 its reverse (13754231), we get a palindrome (26999962).

The spelling of 13245731 in words is "thirteen million, two hundred forty-five thousand, seven hundred thirty-one".