13565120 has 28 divisors (see below), whose sum is σ = 32302704. Its totient is φ = 5425920.

The previous prime is 13565089. The next prime is 13565129. The reversal of 13565120 is 2156531.

It is a super-2 number, since 2×13565120² = 368024961228800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13565129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20876 + ... + 21515.

It is an arithmetic number, because the mean of its divisors is an integer number (1153668).

Almost surely, 2^13565120 is an apocalyptic number.

13565120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13565120 is an abundant number, since it is smaller than the sum of its proper divisors (18737584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13565120 is an equidigital number, since it uses as much as digits as its factorization.

13565120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42408 (or 42398 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 13565120 is about 3683.0856628648. The cubic root of 13565120 is about 238.4924014591.

The spelling of 13565120 in words is "thirteen million, five hundred sixty-five thousand, one hundred twenty".