13255240 has 64 divisors (see below), whose sum is σ = 32056560. Its totient is φ = 4915200.

The previous prime is 13255201. The next prime is 13255243. The reversal of 13255240 is 4255231.

It can be written as a sum of positive squares in 8 ways, for example, as 9622404 + 3632836 = 3102^2 + 1906^2 .

It is not an unprimeable number, because it can be changed into a prime (13255243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68584 + ... + 68776.

Almost surely, 2^13255240 is an apocalyptic number.

13255240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13255240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16028280).

13255240 is an abundant number, since it is smaller than the sum of its proper divisors (18801320).

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

13255240 is a wasteful number, since it uses less digits than its factorization.

13255240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 13255240 is about 3640.7746428473. The cubic root of 13255240 is about 236.6623640911.

Subtracting from 13255240 its reverse (4255231), we obtain a palindrome (9000009).

The spelling of 13255240 in words is "thirteen million, two hundred fifty-five thousand, two hundred forty".