13561287 has 16 divisors (see below), whose sum is σ = 18506880. Its totient is φ = 8831072.

The previous prime is 13561271. The next prime is 13561309. The reversal of 13561287 is 78216531.

It is a cyclic number.

It is not a de Polignac number, because 13561287 - 2⁴ = 13561271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13561487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26389 + ... + 26897.

It is an arithmetic number, because the mean of its divisors is an integer number (1156680).

Almost surely, 2^13561287 is an apocalyptic number.

13561287 is a deficient number, since it is larger than the sum of its proper divisors (4945593).

13561287 is a wasteful number, since it uses less digits than its factorization.

13561287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702.

The product of its digits is 10080, while the sum is 33.

The square root of 13561287 is about 3682.5652743706. The cubic root of 13561287 is about 238.4699363061.

The spelling of 13561287 in words is "thirteen million, five hundred sixty-one thousand, two hundred eighty-seven".