11520657 has 8 divisors (see below), whose sum is σ = 17067680. Its totient is φ = 7680420.

The previous prime is 11520629. The next prime is 11520659. The reversal of 11520657 is 75602511.

11520657 is a `hidden beast` number, since 1 + 1 + 5 + 2 + 0 + 657 = 666.

It is not a de Polignac number, because 11520657 - 2¹⁰ = 11519633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 426691 = 11520657 / (1 + 1 + 5 + 2 + 0 + 6 + 5 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11520657.

It is not an unprimeable number, because it can be changed into a prime (11520659) 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 7 ways as a sum of consecutive naturals, for example, 213319 + ... + 213372.

It is an arithmetic number, because the mean of its divisors is an integer number (2133460).

Almost surely, 2^11520657 is an apocalyptic number.

It is an amenable number.

11520657 is a deficient number, since it is larger than the sum of its proper divisors (5547023).

11520657 is an equidigital number, since it uses as much as digits as its factorization.

11520657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426700 (or 426694 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 11520657 is about 3394.2093335562. The cubic root of 11520657 is about 225.8529403267.

The spelling of 11520657 in words is "eleven million, five hundred twenty thousand, six hundred fifty-seven".