13561172 has 12 divisors (see below), whose sum is σ = 25128180. Its totient is φ = 6381696.

The previous prime is 13561157. The next prime is 13561199. The reversal of 13561172 is 27116531.

It can be written as a sum of positive squares in 2 ways, for example, as 8561476 + 4999696 = 2926^2 + 2236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99647 + ... + 99782.

It is an arithmetic number, because the mean of its divisors is an integer number (2094015).

Almost surely, 2^13561172 is an apocalyptic number.

It is an amenable number.

13561172 is a deficient number, since it is larger than the sum of its proper divisors (11567008).

13561172 is a wasteful number, since it uses less digits than its factorization.

13561172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199450 (or 199448 counting only the distinct ones).

The product of its digits is 1260, while the sum is 26.

The square root of 13561172 is about 3682.5496602218. The cubic root of 13561172 is about 238.4692622275.

The spelling of 13561172 in words is "thirteen million, five hundred sixty-one thousand, one hundred seventy-two".