13565720 has 32 divisors (see below), whose sum is σ = 34884000. Its totient is φ = 4651008.

The previous prime is 13565687. The next prime is 13565723. The reversal of 13565720 is 2756531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13565723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23945 + ... + 24504.

It is an arithmetic number, because the mean of its divisors is an integer number (1090125).

Almost surely, 2^13565720 is an apocalyptic number.

13565720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13565720 is an abundant number, since it is smaller than the sum of its proper divisors (21318280).

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

13565720 is a wasteful number, since it uses less digits than its factorization.

13565720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48467 (or 48463 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 13565720 is about 3683.1671154049. The cubic root of 13565720 is about 238.4959176666.

The spelling of 13565720 in words is "thirteen million, five hundred sixty-five thousand, seven hundred twenty".