11512140 has 48 divisors (see below), whose sum is σ = 32389728. Its totient is φ = 3055104.

The previous prime is 11512097. The next prime is 11512147. The reversal of 11512140 is 4121511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (11512147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18474 + ... + 19086.

It is an arithmetic number, because the mean of its divisors is an integer number (674786).

Almost surely, 2^11512140 is an apocalyptic number.

11512140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11512140 is an abundant number, since it is smaller than the sum of its proper divisors (20877588).

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

11512140 is a wasteful number, since it uses less digits than its factorization.

11512140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 11512140 is about 3392.9544647696. The cubic root of 11512140 is about 225.7972703618.

Adding to 11512140 its reverse (4121511), we get a palindrome (15633651).

The spelling of 11512140 in words is "eleven million, five hundred twelve thousand, one hundred forty".