11212857 has 16 divisors (see below), whose sum is σ = 16663360. Its totient is φ = 7452000.

The previous prime is 11212849. The next prime is 11212867. The reversal of 11212857 is 75821211.

It is not a de Polignac number, because 11212857 - 2³ = 11212849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11212857.

It is not an unprimeable number, because it can be changed into a prime (11212867) 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 15 ways as a sum of consecutive naturals, for example, 15882 + ... + 16572.

It is an arithmetic number, because the mean of its divisors is an integer number (1041460).

Almost surely, 2^11212857 is an apocalyptic number.

It is an amenable number.

11212857 is a deficient number, since it is larger than the sum of its proper divisors (5450503).

11212857 is an equidigital number, since it uses as much as digits as its factorization.

11212857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1295 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 11212857 is about 3348.5604369639. The cubic root of 11212857 is about 223.8233686758.

The spelling of 11212857 in words is "eleven million, two hundred twelve thousand, eight hundred fifty-seven".