13040861 has 2 divisors, whose sum is σ = 13040862. Its totient is φ = 13040860.

The previous prime is 13040857. The next prime is 13040873. The reversal of 13040861 is 16804031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10201636 + 2839225 = 3194^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 13040861 - 2² = 13040857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13040161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6520430 + 6520431.

It is an arithmetic number, because the mean of its divisors is an integer number (6520431).

Almost surely, 2^13040861 is an apocalyptic number.

It is an amenable number.

13040861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13040861 is an equidigital number, since it uses as much as digits as its factorization.

13040861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 13040861 is about 3611.2132310347. The cubic root of 13040861 is about 235.3795646684.

Adding to 13040861 its reverse (16804031), we get a palindrome (29844892).

The spelling of 13040861 in words is "thirteen million, forty thousand, eight hundred sixty-one".