212349 has 4 divisors (see below), whose sum is σ = 283136. Its totient is φ = 141564.

The previous prime is 212297. The next prime is 212353. The reversal of 212349 is 943212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212349 - 2¹² = 208253 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212369) 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 3 ways as a sum of consecutive naturals, for example, 35389 + ... + 35394.

It is an arithmetic number, because the mean of its divisors is an integer number (70784).

2²¹²³⁴⁹ is an apocalyptic number.

It is an amenable number.

212349 is a deficient number, since it is larger than the sum of its proper divisors (70787).

212349 is an equidigital number, since it uses as much as digits as its factorization.

212349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70786.

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

The square root of 212349 is about 460.8134112632. The cubic root of 212349 is about 59.6600216618.

It can be divided in two parts, 212 and 349, that added together give a triangular number (561 = T₃₃).

The spelling of 212349 in words is "two hundred twelve thousand, three hundred forty-nine".