11556289 has 8 divisors (see below), whose sum is σ = 11793320. Its totient is φ = 11321856.

The previous prime is 11556283. The next prime is 11556317. The reversal of 11556289 is 98265511.

It can be written as a sum of positive squares in 4 ways, for example, as 5953600 + 5602689 = 2440^2 + 2367^2 .

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 11556289 - 2⁵ = 11556257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11556283) 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, 10027 + ... + 11119.

It is an arithmetic number, because the mean of its divisors is an integer number (1474165).

Almost surely, 2^11556289 is an apocalyptic number.

It is an amenable number.

11556289 is a deficient number, since it is larger than the sum of its proper divisors (237031).

11556289 is a wasteful number, since it uses less digits than its factorization.

11556289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299.

The product of its digits is 21600, while the sum is 37.

The square root of 11556289 is about 3399.4542209008. The cubic root of 11556289 is about 226.0855459687.

The spelling of 11556289 in words is "eleven million, five hundred fifty-six thousand, two hundred eighty-nine".