11520401 has 4 divisors (see below), whose sum is σ = 12021312. Its totient is φ = 11019492.

The previous prime is 11520391. The next prime is 11520409. The reversal of 11520401 is 10402511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11520401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11520409) 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 3 ways as a sum of consecutive naturals, for example, 250421 + ... + 250466.

It is an arithmetic number, because the mean of its divisors is an integer number (3005328).

Almost surely, 2^11520401 is an apocalyptic number.

It is an amenable number.

11520401 is a deficient number, since it is larger than the sum of its proper divisors (500911).

11520401 is an equidigital number, since it uses as much as digits as its factorization.

11520401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500910.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 11520401 is about 3394.1716220604. The cubic root of 11520401 is about 225.8512674250.

Adding to 11520401 its reverse (10402511), we get a palindrome (21922912).

The spelling of 11520401 in words is "eleven million, five hundred twenty thousand, four hundred one".