138212 has 12 divisors (see below), whose sum is σ = 244860. Its totient is φ = 68256.

The previous prime is 138209. The next prime is 138239. The reversal of 138212 is 212831.

138212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 45796 + 92416 = 214^2 + 304^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278 + ... + 594.

It is an arithmetic number, because the mean of its divisors is an integer number (20405).

2¹³⁸²¹² is an apocalyptic number.

It is an amenable number.

138212 is a deficient number, since it is larger than the sum of its proper divisors (106648).

138212 is a wasteful number, since it uses less digits than its factorization.

138212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 428 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 138212 is about 371.7687453243. The cubic root of 138212 is about 51.7029413429.

The spelling of 138212 in words is "one hundred thirty-eight thousand, two hundred twelve".