212439 has 8 divisors (see below), whose sum is σ = 298240. Its totient is φ = 134136.

The previous prime is 212437. The next prime is 212447. The reversal of 212439 is 934212.

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

It is not a de Polignac number, because 212439 - 2¹ = 212437 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212437) 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, 1807 + ... + 1920.

It is an arithmetic number, because the mean of its divisors is an integer number (37280).

2²¹²⁴³⁹ is an apocalyptic number.

212439 is a deficient number, since it is larger than the sum of its proper divisors (85801).

212439 is a wasteful number, since it uses less digits than its factorization.

212439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3749.

The product of its digits is 432, while the sum is 21.

The square root of 212439 is about 460.9110543261. The cubic root of 212439 is about 59.6684490519.

The spelling of 212439 in words is "two hundred twelve thousand, four hundred thirty-nine".