11982857 has 6 divisors (see below), whose sum is σ = 12316878. Its totient is φ = 11657664.

The previous prime is 11982851. The next prime is 11982881. The reversal of 11982857 is 75828911.

It can be written as a sum of positive squares in 3 ways, for example, as 9096256 + 2886601 = 3016^2 + 1699^2 .

It is not a de Polignac number, because 11982857 - 2⁸ = 11982601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11982851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3008 + ... + 5745.

It is an arithmetic number, because the mean of its divisors is an integer number (2052813).

Almost surely, 2^11982857 is an apocalyptic number.

It is an amenable number.

11982857 is a deficient number, since it is larger than the sum of its proper divisors (334021).

11982857 is an frugal number, since it uses more digits than its factorization.

11982857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8827 (or 8790 counting only the distinct ones).

The product of its digits is 40320, while the sum is 41.

The square root of 11982857 is about 3461.6263518757. The cubic root of 11982857 is about 228.8337752415.

The spelling of 11982857 in words is "eleven million, nine hundred eighty-two thousand, eight hundred fifty-seven".