12210857 has 2 divisors, whose sum is σ = 12210858. Its totient is φ = 12210856.

The previous prime is 12210853. The next prime is 12210871. The reversal of 12210857 is 75801221.

12210857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11162281 + 1048576 = 3341^2 + 1024^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210857 - 2² = 12210853 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12210853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105428 + 6105429.

It is an arithmetic number, because the mean of its divisors is an integer number (6105429).

Almost surely, 2^12210857 is an apocalyptic number.

It is an amenable number.

12210857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210857 is an equidigital number, since it uses as much as digits as its factorization.

12210857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12210857 is about 3494.4036687252. The cubic root of 12210857 is about 230.2760202258.

The spelling of 12210857 in words is "twelve million, two hundred ten thousand, eight hundred fifty-seven".