11565121 has 8 divisors (see below), whose sum is σ = 11829600. Its totient is φ = 11303040.

The previous prime is 11565101. The next prime is 11565131. The reversal of 11565121 is 12156511.

It is a happy number.

11565121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11565121 - 2⁵ = 11565089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11565092 and 11565101.

It is not an unprimeable number, because it can be changed into a prime (11565101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11985 + ... + 12913.

It is an arithmetic number, because the mean of its divisors is an integer number (1478700).

Almost surely, 2^11565121 is an apocalyptic number.

It is an amenable number.

11565121 is a deficient number, since it is larger than the sum of its proper divisors (264479).

11565121 is an equidigital number, since it uses as much as digits as its factorization.

11565121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199.

The product of its digits is 300, while the sum is 22.

The square root of 11565121 is about 3400.7530048505. The cubic root of 11565121 is about 226.1431272871.

The spelling of 11565121 in words is "eleven million, five hundred sixty-five thousand, one hundred twenty-one".