139992 has 32 divisors (see below), whose sum is σ = 369600. Its totient is φ = 44064.

The previous prime is 139991. The next prime is 139999. The reversal of 139992 is 299931.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139992.

It is not an unprimeable number, because it can be changed into a prime (139991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303 + ... + 609.

It is an arithmetic number, because the mean of its divisors is an integer number (11550).

2¹³⁹⁹⁹² is an apocalyptic number.

139992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184800).

139992 is an abundant number, since it is smaller than the sum of its proper divisors (229608).

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

139992 is a wasteful number, since it uses less digits than its factorization.

139992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 331 counting only the distinct ones).

The product of its digits is 4374, while the sum is 33.

The square root of 139992 is about 374.1550480750. The cubic root of 139992 is about 51.9239519532.

It can be divided in two parts, 1 and 39992, that added together give a palindrome (39993).

The spelling of 139992 in words is "one hundred thirty-nine thousand, nine hundred ninety-two".