11556851 has 4 divisors (see below), whose sum is σ = 11563704. Its totient is φ = 11550000.

The previous prime is 11556841. The next prime is 11556859. The reversal of 11556851 is 15865511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11556851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11556859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076 + ... + 4926.

It is an arithmetic number, because the mean of its divisors is an integer number (2890926).

Almost surely, 2^11556851 is an apocalyptic number.

11556851 is a deficient number, since it is larger than the sum of its proper divisors (6853).

11556851 is an equidigital number, since it uses as much as digits as its factorization.

11556851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6852.

The product of its digits is 6000, while the sum is 32.

The square root of 11556851 is about 3399.5368802235. The cubic root of 11556851 is about 226.0892108712.

The spelling of 11556851 in words is "eleven million, five hundred fifty-six thousand, eight hundred fifty-one".