13516641 has 6 divisors (see below), whose sum is σ = 19524050. Its totient is φ = 9011088.

The previous prime is 13516627. The next prime is 13516661. The reversal of 13516641 is 14661531.

13516641 is a `hidden beast` number, since 1 + 3 + 5 + 16 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8208225 + 5308416 = 2865^2 + 2304^2 .

It is not a de Polignac number, because 13516641 - 2⁵ = 13516609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13516621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 750916 + ... + 750933.

Almost surely, 2^13516641 is an apocalyptic number.

It is an amenable number.

13516641 is a deficient number, since it is larger than the sum of its proper divisors (6007409).

13516641 is a wasteful number, since it uses less digits than its factorization.

13516641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501855 (or 1501852 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 13516641 is about 3676.4984700119. The cubic root of 13516641 is about 238.2079544408.

The spelling of 13516641 in words is "thirteen million, five hundred sixteen thousand, six hundred forty-one".