13120531 has 2 divisors, whose sum is σ = 13120532. Its totient is φ = 13120530.

The previous prime is 13120529. The next prime is 13120537. The reversal of 13120531 is 13502131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13120531 - 2¹ = 13120529 is a prime.

It is a super-2 number, since 2×13120531² = 344296667443922, which contains 22 as substring.

Together with 13120529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13120537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560265 + 6560266.

It is an arithmetic number, because the mean of its divisors is an integer number (6560266).

Almost surely, 2^13120531 is an apocalyptic number.

13120531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13120531 is an equidigital number, since it uses as much as digits as its factorization.

13120531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13120531 is about 3622.2273534388. The cubic root of 13120531 is about 235.8579234377.

Adding to 13120531 its reverse (13502131), we get a palindrome (26622662).

The spelling of 13120531 in words is "thirteen million, one hundred twenty thousand, five hundred thirty-one".