13235681 has 2 divisors, whose sum is σ = 13235682. Its totient is φ = 13235680.

The previous prime is 13235669. The next prime is 13235693. The reversal of 13235681 is 18653231.

It is a balanced prime because it is at equal distance from previous prime (13235669) and next prime (13235693).

It can be written as a sum of positive squares in only one way, i.e., 12845056 + 390625 = 3584^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 13235681 - 2⁶ = 13235617 is a prime.

It is a super-2 number, since 2×13235681² = 350366503067522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13235881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6617840 + 6617841.

It is an arithmetic number, because the mean of its divisors is an integer number (6617841).

Almost surely, 2^13235681 is an apocalyptic number.

It is an amenable number.

13235681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13235681 is an equidigital number, since it uses as much as digits as its factorization.

13235681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 13235681 is about 3638.0875470500. The cubic root of 13235681 is about 236.5459030340.

The spelling of 13235681 in words is "thirteen million, two hundred thirty-five thousand, six hundred eighty-one".