138412 has 6 divisors (see below), whose sum is σ = 242228. Its totient is φ = 69204.

The previous prime is 138407. The next prime is 138427. The reversal of 138412 is 214831.

It is a self number, because there is not a number n which added to its sum of digits gives 138412.

It is an unprimeable number.

138412 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17298 + ... + 17305.

2¹³⁸⁴¹² is an apocalyptic number.

It is an amenable number.

138412 is a deficient number, since it is larger than the sum of its proper divisors (103816).

138412 is a wasteful number, since it uses less digits than its factorization.

138412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34607 (or 34605 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 138412 is about 372.0376325051. The cubic root of 138412 is about 51.7278682776.

The spelling of 138412 in words is "one hundred thirty-eight thousand, four hundred twelve".