13561801 has 24 divisors (see below), whose sum is σ = 16662240. Its totient is φ = 10961280.

The previous prime is 13561783. The next prime is 13561829. The reversal of 13561801 is 10816531.

It is not a de Polignac number, because 13561801 - 2¹¹ = 13559753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13561841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38910 + ... + 39256.

It is an arithmetic number, because the mean of its divisors is an integer number (694260).

Almost surely, 2^13561801 is an apocalyptic number.

13561801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13561801 is a deficient number, since it is larger than the sum of its proper divisors (3100439).

13561801 is a wasteful number, since it uses less digits than its factorization.

13561801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 13561801 is about 3682.6350620174. The cubic root of 13561801 is about 238.4729490978.

The spelling of 13561801 in words is "thirteen million, five hundred sixty-one thousand, eight hundred one".