212340 has 24 divisors (see below), whose sum is σ = 594720. Its totient is φ = 56608.

The previous prime is 212297. The next prime is 212353. The reversal of 212340 is 43212.

It is a super-3 number, since 3×212340³ = 28722133322712000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

212340 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1710 + ... + 1829.

It is an arithmetic number, because the mean of its divisors is an integer number (24780).

2²¹²³⁴⁰ is an apocalyptic number.

212340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212340 is an abundant number, since it is smaller than the sum of its proper divisors (382380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212340 is a wasteful number, since it uses less digits than its factorization.

212340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551 (or 3549 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 212340 is about 460.8036458189. The cubic root of 212340 is about 59.6591787919.

Adding to 212340 its reverse (43212), we get a palindrome (255552).

The spelling of 212340 in words is "two hundred twelve thousand, three hundred forty", and thus it is an iban number.