13981761 has 32 divisors (see below), whose sum is σ = 21542400. Its totient is φ = 8957520.

The previous prime is 13981729. The next prime is 13981789. The reversal of 13981761 is 16718931.

It is not a de Polignac number, because 13981761 - 2⁵ = 13981729 is a prime.

It is a super-2 number, since 2×13981761² = 390979281322242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13981661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106666 + ... + 106796.

It is an arithmetic number, because the mean of its divisors is an integer number (673200).

Almost surely, 2^13981761 is an apocalyptic number.

It is an amenable number.

13981761 is a deficient number, since it is larger than the sum of its proper divisors (7560639).

13981761 is a wasteful number, since it uses less digits than its factorization.

13981761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 260 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 13981761 is about 3739.2193035445. The cubic root of 13981761 is about 240.9095176363.

The spelling of 13981761 in words is "thirteen million, nine hundred eighty-one thousand, seven hundred sixty-one".