13120431 has 16 divisors (see below), whose sum is σ = 18493440. Its totient is φ = 8251200.

The previous prime is 13120427. The next prime is 13120483. The reversal of 13120431 is 13402131.

It is not a de Polignac number, because 13120431 - 2² = 13120427 is a prime.

It is a super-2 number, since 2×13120431² = 344291419251522, 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 13120431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120411) 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 15 ways as a sum of consecutive naturals, for example, 21531 + ... + 22131.

It is an arithmetic number, because the mean of its divisors is an integer number (1155840).

Almost surely, 2^13120431 is an apocalyptic number.

13120431 is a deficient number, since it is larger than the sum of its proper divisors (5373009).

13120431 is a wasteful number, since it uses less digits than its factorization.

13120431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13120431 is about 3622.2135497510. The cubic root of 13120431 is about 235.8573242279.

Adding to 13120431 its reverse (13402131), we get a palindrome (26522562).

The spelling of 13120431 in words is "thirteen million, one hundred twenty thousand, four hundred thirty-one".