13664125 has 8 divisors (see below), whose sum is σ = 17052984. Its totient is φ = 10931200.

The previous prime is 13664071. The next prime is 13664129. The reversal of 13664125 is 52146631.

It can be written as a sum of positive squares in 4 ways, for example, as 3147076 + 10517049 = 1774^2 + 3243^2 .

It is not a de Polignac number, because 13664125 - 2⁷ = 13663997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13664093 and 13664102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54532 + ... + 54781.

It is an arithmetic number, because the mean of its divisors is an integer number (2131623).

Almost surely, 2^13664125 is an apocalyptic number.

It is an amenable number.

13664125 is a deficient number, since it is larger than the sum of its proper divisors (3388859).

13664125 is an equidigital number, since it uses as much as digits as its factorization.

13664125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109328 (or 109318 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 13664125 is about 3696.5017246040. The cubic root of 13664125 is about 239.0712076940.

It can be divided in two parts, 136 and 64125, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 13664125 in words is "thirteen million, six hundred sixty-four thousand, one hundred twenty-five".