11520661 has 2 divisors, whose sum is σ = 11520662. Its totient is φ = 11520660.

The previous prime is 11520659. The next prime is 11520667. The reversal of 11520661 is 16602511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11492100 + 28561 = 3390^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 11520661 - 2¹ = 11520659 is a prime.

Together with 11520659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11520667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760330 + 5760331.

It is an arithmetic number, because the mean of its divisors is an integer number (5760331).

Almost surely, 2^11520661 is an apocalyptic number.

It is an amenable number.

11520661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11520661 is an equidigital number, since it uses as much as digits as its factorization.

11520661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 11520661 is about 3394.2099227950. The cubic root of 11520661 is about 225.8529664656.

The spelling of 11520661 in words is "eleven million, five hundred twenty thousand, six hundred sixty-one".