13657641 has 4 divisors (see below), whose sum is σ = 18210192. Its totient is φ = 9105092.

The previous prime is 13657621. The next prime is 13657649. The reversal of 13657641 is 14675631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13657641 - 2¹⁵ = 13624873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13657649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276271 + ... + 2276276.

It is an arithmetic number, because the mean of its divisors is an integer number (4552548).

Almost surely, 2^13657641 is an apocalyptic number.

It is an amenable number.

13657641 is a deficient number, since it is larger than the sum of its proper divisors (4552551).

13657641 is an equidigital number, since it uses as much as digits as its factorization.

13657641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552550.

The product of its digits is 15120, while the sum is 33.

The square root of 13657641 is about 3695.6245750888. The cubic root of 13657641 is about 239.0333864414.

The spelling of 13657641 in words is "thirteen million, six hundred fifty-seven thousand, six hundred forty-one".