212421394 has 8 divisors (see below), whose sum is σ = 318702780. Its totient is φ = 106187136.

The previous prime is 212421389. The next prime is 212421431. The reversal of 212421394 is 493124212.

It can be written as a sum of positive squares in 2 ways, for example, as 208369225 + 4052169 = 14435^2 + 2013^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3402 + ... + 20890.

Almost surely, 2^212421394 is an apocalyptic number.

212421394 is a deficient number, since it is larger than the sum of its proper divisors (106281386).

212421394 is a wasteful number, since it uses less digits than its factorization.

212421394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23564.

The product of its digits is 3456, while the sum is 28.

The square root of 212421394 is about 14574.6833241755. The cubic root of 212421394 is about 596.6680065442.

The spelling of 212421394 in words is "two hundred twelve million, four hundred twenty-one thousand, three hundred ninety-four".