13572661 has 2 divisors, whose sum is σ = 13572662. Its totient is φ = 13572660.

The previous prime is 13572623. The next prime is 13572677. The reversal of 13572661 is 16627531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10278436 + 3294225 = 3206^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 13572661 - 2²¹ = 11475509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13582661) 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, 6786330 + 6786331.

It is an arithmetic number, because the mean of its divisors is an integer number (6786331).

Almost surely, 2^13572661 is an apocalyptic number.

It is an amenable number.

13572661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13572661 is an equidigital number, since it uses as much as digits as its factorization.

13572661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 13572661 is about 3684.1092546232. The cubic root of 13572661 is about 238.5365867922.

The spelling of 13572661 in words is "thirteen million, five hundred seventy-two thousand, six hundred sixty-one".