13561864 has 8 divisors (see below), whose sum is σ = 25428510. Its totient is φ = 6780928.

The previous prime is 13561859. The next prime is 13561883. The reversal of 13561864 is 46816531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12659364 + 902500 = 3558^2 + 950^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847609 + ... + 847624.

Almost surely, 2^13561864 is an apocalyptic number.

It is an amenable number.

13561864 is a deficient number, since it is larger than the sum of its proper divisors (11866646).

13561864 is a wasteful number, since it uses less digits than its factorization.

13561864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695239 (or 1695235 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 13561864 is about 3682.6436156652. The cubic root of 13561864 is about 238.4733183647.

The spelling of 13561864 in words is "thirteen million, five hundred sixty-one thousand, eight hundred sixty-four".