139812 has 24 divisors (see below), whose sum is σ = 333312. Its totient is φ = 45600.

The previous prime is 139801. The next prime is 139813. The reversal of 139812 is 218931.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139812.

It is not an unprimeable number, because it can be changed into a prime (139813) by changing a digit.

139812 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 (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637 + ... + 827.

It is an arithmetic number, because the mean of its divisors is an integer number (13888).

2¹³⁹⁸¹² is an apocalyptic number.

139812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139812 is an abundant number, since it is smaller than the sum of its proper divisors (193500).

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

139812 is a wasteful number, since it uses less digits than its factorization.

139812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 257 counting only the distinct ones).

The product of its digits is 432, while the sum is 24.

The square root of 139812 is about 373.9144287133. The cubic root of 139812 is about 51.9016880143.

The spelling of 139812 in words is "one hundred thirty-nine thousand, eight hundred twelve".