212857249 has 8 divisors (see below), whose sum is σ = 242304192. Its totient is φ = 185093040.

The previous prime is 212857241. The next prime is 212857259. The reversal of 212857249 is 942758212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212857249 - 2³ = 212857241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212857241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420414 + ... + 420919.

It is an arithmetic number, because the mean of its divisors is an integer number (30288024).

Almost surely, 2^212857249 is an apocalyptic number.

It is an amenable number.

212857249 is a deficient number, since it is larger than the sum of its proper divisors (29446943).

212857249 is a wasteful number, since it uses less digits than its factorization.

212857249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841367.

The product of its digits is 80640, while the sum is 40.

The square root of 212857249 is about 14589.6281309703. The cubic root of 212857249 is about 597.0758171132.

The spelling of 212857249 in words is "two hundred twelve million, eight hundred fifty-seven thousand, two hundred forty-nine".