13656745 has 4 divisors (see below), whose sum is σ = 16388100. Its totient is φ = 10925392.

The previous prime is 13656739. The next prime is 13656749. The reversal of 13656745 is 54765631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4439449 + 9217296 = 2107^2 + 3036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13656745 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13656749) 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, 1365670 + ... + 1365679.

It is an arithmetic number, because the mean of its divisors is an integer number (4097025).

Almost surely, 2^13656745 is an apocalyptic number.

It is an amenable number.

13656745 is a deficient number, since it is larger than the sum of its proper divisors (2731355).

13656745 is an equidigital number, since it uses as much as digits as its factorization.

13656745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731354.

The product of its digits is 75600, while the sum is 37.

The square root of 13656745 is about 3695.5033486658. The cubic root of 13656745 is about 239.0281591209.

The spelling of 13656745 in words is "thirteen million, six hundred fifty-six thousand, seven hundred forty-five".