139212 has 24 divisors (see below), whose sum is σ = 361200. Its totient is φ = 46368.

The previous prime is 139201. The next prime is 139241. The reversal of 139212 is 212931.

It is a happy number.

139212 is nontrivially palindromic in base 8.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537 + ... + 752.

It is an arithmetic number, because the mean of its divisors is an integer number (15050).

2¹³⁹²¹² is an apocalyptic number.

139212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139212 is an abundant number, since it is smaller than the sum of its proper divisors (221988).

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

139212 is a wasteful number, since it uses less digits than its factorization.

139212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1294 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 139212 is about 373.1112434650. Note that the first 3 decimals coincide. The cubic root of 139212 is about 51.8273365845.

It can be divided in two parts, 139 and 212, that added together give a triangular number (351 = T₂₆).

The spelling of 139212 in words is "one hundred thirty-nine thousand, two hundred twelve".