11565140 has 24 divisors (see below), whose sum is σ = 24374112. Its totient is φ = 4609440.

The previous prime is 11565133. The next prime is 11565143. The reversal of 11565140 is 4156511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11565143) 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, 5747 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (1015588).

Almost surely, 2^11565140 is an apocalyptic number.

11565140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11565140 is an abundant number, since it is smaller than the sum of its proper divisors (12808972).

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

11565140 is a wasteful number, since it uses less digits than its factorization.

11565140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087 (or 2085 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 11565140 is about 3400.7557983484. The cubic root of 11565140 is about 226.1432511284.

It can be divided in two parts, 11565 and 140, that multiplied together give a triangular number (1619100 = T₁₇₉₉).

The spelling of 11565140 in words is "eleven million, five hundred sixty-five thousand, one hundred forty".