11520945 has 12 divisors (see below), whose sum is σ = 19969716. Its totient is φ = 6144480.

The previous prime is 11520941. The next prime is 11520967. The reversal of 11520945 is 54902511.

It can be written as a sum of positive squares in 2 ways, for example, as 6471936 + 5049009 = 2544^2 + 2247^2 .

It is not a de Polignac number, because 11520945 - 2² = 11520941 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11520941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127966 + ... + 128055.

It is an arithmetic number, because the mean of its divisors is an integer number (1664143).

Almost surely, 2^11520945 is an apocalyptic number.

11520945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11520945 is a deficient number, since it is larger than the sum of its proper divisors (8448771).

11520945 is a wasteful number, since it uses less digits than its factorization.

11520945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256032 (or 256029 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 11520945 is about 3394.2517584882. The cubic root of 11520945 is about 225.8548223115.

The spelling of 11520945 in words is "eleven million, five hundred twenty thousand, nine hundred forty-five".