13975581 has 16 divisors (see below), whose sum is σ = 19958400. Its totient is φ = 8667648.

The previous prime is 13975567. The next prime is 13975607. The reversal of 13975581 is 18557931.

It is a de Polignac number, because none of the positive numbers 2^k-13975581 is a prime.

It is a super-2 number, since 2×13975581² = 390633728575122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13975531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3000 + ... + 6078.

It is an arithmetic number, because the mean of its divisors is an integer number (1247400).

Almost surely, 2^13975581 is an apocalyptic number.

It is an amenable number.

13975581 is a deficient number, since it is larger than the sum of its proper divisors (5982819).

13975581 is a wasteful number, since it uses less digits than its factorization.

13975581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188.

The product of its digits is 37800, while the sum is 39.

The square root of 13975581 is about 3738.3928365007. The cubic root of 13975581 is about 240.8740180492.

The spelling of 13975581 in words is "thirteen million, nine hundred seventy-five thousand, five hundred eighty-one".