13025681 has 2 divisors, whose sum is σ = 13025682. Its totient is φ = 13025680.

The previous prime is 13025647. The next prime is 13025687. The reversal of 13025681 is 18652031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12845056 + 180625 = 3584^2 + 425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13025681 is a prime.

It is a super-4 number, since 4×13025681⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 13025681.

It is not a weakly prime, because it can be changed into another prime (13025687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6512840 + 6512841.

It is an arithmetic number, because the mean of its divisors is an integer number (6512841).

Almost surely, 2^13025681 is an apocalyptic number.

It is an amenable number.

13025681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13025681 is an equidigital number, since it uses as much as digits as its factorization.

13025681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 13025681 is about 3609.1108323242. The cubic root of 13025681 is about 235.2881993033.

The spelling of 13025681 in words is "thirteen million, twenty-five thousand, six hundred eighty-one".