212868457 has 8 divisors (see below), whose sum is σ = 225014400. Its totient is φ = 200816784.

The previous prime is 212868431. The next prime is 212868479. The reversal of 212868457 is 754868212.

It is a happy number.

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 212868457 - 2⁷ = 212868329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212868857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18898 + ... + 27979.

It is an arithmetic number, because the mean of its divisors is an integer number (28126800).

Almost surely, 2^212868457 is an apocalyptic number.

It is an amenable number.

212868457 is a deficient number, since it is larger than the sum of its proper divisors (12145943).

212868457 is a wasteful number, since it uses less digits than its factorization.

212868457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47135.

The product of its digits is 215040, while the sum is 43.

The square root of 212868457 is about 14590.0122344020. The cubic root of 212868457 is about 597.0862966064.

The spelling of 212868457 in words is "two hundred twelve million, eight hundred sixty-eight thousand, four hundred fifty-seven".