13121497 has 2 divisors, whose sum is σ = 13121498. Its totient is φ = 13121496.

The previous prime is 13121489. The next prime is 13121503. The reversal of 13121497 is 79412131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13097161 + 24336 = 3619^2 + 156^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121497 - 2³ = 13121489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13121417) 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 as a sum of consecutive naturals, namely, 6560748 + 6560749.

It is an arithmetic number, because the mean of its divisors is an integer number (6560749).

Almost surely, 2^13121497 is an apocalyptic number.

It is an amenable number.

13121497 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121497 is an equidigital number, since it uses as much as digits as its factorization.

13121497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 13121497 is about 3622.3606943539. The cubic root of 13121497 is about 235.8637116476.

It can be divided in two parts, 1312 and 1497, that added together give a square (2809 = 53²).

The spelling of 13121497 in words is "thirteen million, one hundred twenty-one thousand, four hundred ninety-seven".