13217860 has 12 divisors (see below), whose sum is σ = 27757548. Its totient is φ = 5287136.

The previous prime is 13217849. The next prime is 13217861. The reversal of 13217860 is 6871231.

It can be written as a sum of positive squares in 2 ways, for example, as 8655364 + 4562496 = 2942^2 + 2136^2 .

It is not an unprimeable number, because it can be changed into a prime (13217861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330427 + ... + 330466.

It is an arithmetic number, because the mean of its divisors is an integer number (2313129).

Almost surely, 2^13217860 is an apocalyptic number.

13217860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13217860 is an abundant number, since it is smaller than the sum of its proper divisors (14539688).

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

13217860 is a wasteful number, since it uses less digits than its factorization.

13217860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660902 (or 660900 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 13217860 is about 3635.6374956808. The cubic root of 13217860 is about 236.4396906949.

The spelling of 13217860 in words is "thirteen million, two hundred seventeen thousand, eight hundred sixty".