11520861 has 32 divisors (see below), whose sum is σ = 17943552. Its totient is φ = 6504960.

The previous prime is 11520853. The next prime is 11520863. The reversal of 11520861 is 16802511.

It is not a de Polignac number, because 11520861 - 2³ = 11520853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32461 + ... + 32813.

It is an arithmetic number, because the mean of its divisors is an integer number (560736).

Almost surely, 2^11520861 is an apocalyptic number.

11520861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11520861 is a deficient number, since it is larger than the sum of its proper divisors (6422691).

11520861 is a wasteful number, since it uses less digits than its factorization.

11520861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 11520861 is about 3394.2393846045. The cubic root of 11520861 is about 225.8542734025.

The spelling of 11520861 in words is "eleven million, five hundred twenty thousand, eight hundred sixty-one".