13040857 has 2 divisors, whose sum is σ = 13040858. Its totient is φ = 13040856.

The previous prime is 13040843. The next prime is 13040861. The reversal of 13040857 is 75804031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12187081 + 853776 = 3491^2 + 924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13040857 is a prime.

It is a super-3 number, since 3×13040857³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (13040827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6520428 + 6520429.

It is an arithmetic number, because the mean of its divisors is an integer number (6520429).

Almost surely, 2^13040857 is an apocalyptic number.

It is an amenable number.

13040857 is a deficient number, since it is larger than the sum of its proper divisors (1).

13040857 is an equidigital number, since it uses as much as digits as its factorization.

13040857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 13040857 is about 3611.2126772042. The cubic root of 13040857 is about 235.3795406025.

Adding to 13040857 its reverse (75804031), we get a palindrome (88844888).

The spelling of 13040857 in words is "thirteen million, forty thousand, eight hundred fifty-seven".