13111240 has 32 divisors (see below), whose sum is σ = 29607480. Its totient is φ = 5225472.

The previous prime is 13111237. The next prime is 13111271. The reversal of 13111240 is 4211131.

It can be written as a sum of positive squares in 4 ways, for example, as 8608356 + 4502884 = 2934^2 + 2122^2 .

It is a super-2 number, since 2×13111240² = 343809228675200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13111240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16942 + ... + 17698.

Almost surely, 2^13111240 is an apocalyptic number.

13111240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111240 is an abundant number, since it is smaller than the sum of its proper divisors (16496240).

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

13111240 is a wasteful number, since it uses less digits than its factorization.

13111240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1197 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 13111240 is about 3620.9446281323. The cubic root of 13111240 is about 235.8022378504.

Adding to 13111240 its reverse (4211131), we get a palindrome (17322371).

The spelling of 13111240 in words is "thirteen million, one hundred eleven thousand, two hundred forty".