11513140 has 24 divisors (see below), whose sum is σ = 24576552. Its totient is φ = 4529280.

The previous prime is 11513077. The next prime is 11513141. The reversal of 11513140 is 4131511.

It can be written as a sum of positive squares in 4 ways, for example, as 34596 + 11478544 = 186^2 + 3388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11513141) 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, 3499 + ... + 5938.

It is an arithmetic number, because the mean of its divisors is an integer number (1024023).

Almost surely, 2^11513140 is an apocalyptic number.

11513140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11513140 is an abundant number, since it is smaller than the sum of its proper divisors (13063412).

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

11513140 is a wasteful number, since it uses less digits than its factorization.

11513140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9507 (or 9505 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 11513140 is about 3393.1018257636. The cubic root of 11513140 is about 225.8038081192.

Adding to 11513140 its reverse (4131511), we get a palindrome (15644651).

The spelling of 11513140 in words is "eleven million, five hundred thirteen thousand, one hundred forty".