13243280 has 20 divisors (see below), whose sum is σ = 30790812. Its totient is φ = 5297280.

The previous prime is 13243273. The next prime is 13243297. The reversal of 13243280 is 8234231.

It can be written as a sum of positive squares in 2 ways, for example, as 2458624 + 10784656 = 1568^2 + 3284^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82691 + ... + 82850.

Almost surely, 2^13243280 is an apocalyptic number.

13243280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13243280 is an abundant number, since it is smaller than the sum of its proper divisors (17547532).

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

13243280 is a wasteful number, since it uses less digits than its factorization.

13243280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165554 (or 165548 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 13243280 is about 3639.1317645834. The cubic root of 13243280 is about 236.5911637306.

The spelling of 13243280 in words is "thirteen million, two hundred forty-three thousand, two hundred eighty".