212539 has 4 divisors (see below), whose sum is σ = 213624. Its totient is φ = 211456.

The previous prime is 212507. The next prime is 212557. The reversal of 212539 is 935212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212539 - 2⁵ = 212507 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157 + ... + 670.

It is an arithmetic number, because the mean of its divisors is an integer number (53406).

2²¹²⁵³⁹ is an apocalyptic number.

212539 is a deficient number, since it is larger than the sum of its proper divisors (1085).

212539 is an equidigital number, since it uses as much as digits as its factorization.

212539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its digits is 540, while the sum is 22.

The square root of 212539 is about 461.0195223632. The cubic root of 212539 is about 59.6778100275.

The spelling of 212539 in words is "two hundred twelve thousand, five hundred thirty-nine".