13124739 has 4 divisors (see below), whose sum is σ = 17499656. Its totient is φ = 8749824.

The previous prime is 13124723. The next prime is 13124747. The reversal of 13124739 is 93742131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13124739 - 2⁴ = 13124723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13124339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2187454 + ... + 2187459.

It is an arithmetic number, because the mean of its divisors is an integer number (4374914).

Almost surely, 2^13124739 is an apocalyptic number.

13124739 is a deficient number, since it is larger than the sum of its proper divisors (4374917).

13124739 is an equidigital number, since it uses as much as digits as its factorization.

13124739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374916.

The product of its digits is 4536, while the sum is 30.

The square root of 13124739 is about 3622.8081649461. The cubic root of 13124739 is about 235.8831354269.

The spelling of 13124739 in words is "thirteen million, one hundred twenty-four thousand, seven hundred thirty-nine".