13321560 has 64 divisors (see below), whose sum is σ = 45676800. Its totient is φ = 3044736.

The previous prime is 13321559. The next prime is 13321579. The reversal of 13321560 is 6512331.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7090 + ... + 8769.

It is an arithmetic number, because the mean of its divisors is an integer number (713700).

Almost surely, 2^13321560 is an apocalyptic number.

13321560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13321560 is an abundant number, since it is smaller than the sum of its proper divisors (32355240).

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

13321560 is a wasteful number, since it uses less digits than its factorization.

13321560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15880 (or 15876 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 13321560 is about 3649.8712306053. The cubic root of 13321560 is about 237.0564055957.

Adding to 13321560 its reverse (6512331), we get a palindrome (19833891).

The spelling of 13321560 in words is "thirteen million, three hundred twenty-one thousand, five hundred sixty".