212839 has 6 divisors (see below), whose sum is σ = 234080. Its totient is φ = 193380.

The previous prime is 212837. The next prime is 212843. The reversal of 212839 is 938212.

It is not a de Polignac number, because 212839 - 2¹ = 212837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212837) 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 5 ways as a sum of consecutive naturals, for example, 759 + ... + 1000.

2²¹²⁸³⁹ is an apocalyptic number.

212839 is a deficient number, since it is larger than the sum of its proper divisors (21241).

212839 is a wasteful number, since it uses less digits than its factorization.

212839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1770 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 212839 is about 461.3447734612. The cubic root of 212839 is about 59.7058753489.

The spelling of 212839 in words is "two hundred twelve thousand, eight hundred thirty-nine".