11131240 has 32 divisors (see below), whose sum is σ = 25142760. Its totient is φ = 4435200.

The previous prime is 11131231. The next prime is 11131247. The reversal of 11131240 is 4213111.

11131240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6895876 + 4235364 = 2626^2 + 2058^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11131240.

It is not an unprimeable number, because it can be changed into a prime (11131247) 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, 16510 + ... + 17170.

Almost surely, 2^11131240 is an apocalyptic number.

11131240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11131240 is an abundant number, since it is smaller than the sum of its proper divisors (14011520).

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

11131240 is a wasteful number, since it uses less digits than its factorization.

11131240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1089 counting only the distinct ones).

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

The square root of 11131240 is about 3336.3513004478. The cubic root of 11131240 is about 223.2789848199.

Adding to 11131240 its reverse (4213111), we get a palindrome (15344351).

The spelling of 11131240 in words is "eleven million, one hundred thirty-one thousand, two hundred forty".