13117240 has 32 divisors (see below), whose sum is σ = 30314880. Its totient is φ = 5104512.

The previous prime is 13117231. The next prime is 13117241. The reversal of 13117240 is 4271131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13117241) 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, 2952 + ... + 5911.

It is an arithmetic number, because the mean of its divisors is an integer number (947340).

Almost surely, 2^13117240 is an apocalyptic number.

13117240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13117240 is an abundant number, since it is smaller than the sum of its proper divisors (17197640).

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

13117240 is a wasteful number, since it uses less digits than its factorization.

13117240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8911 (or 8907 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 13117240 is about 3621.7730464511. The cubic root of 13117240 is about 235.8382018443.

Adding to 13117240 its reverse (4271131), we get a palindrome (17388371).

It can be divided in two parts, 131 and 17240, that added together give a palindrome (17371).

The spelling of 13117240 in words is "thirteen million, one hundred seventeen thousand, two hundred forty".