139612 has 24 divisors (see below), whose sum is σ = 282240. Its totient is φ = 59760.

The previous prime is 139609. The next prime is 139619. The reversal of 139612 is 216931.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139619) 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, 753 + ... + 919.

It is an arithmetic number, because the mean of its divisors is an integer number (11760).

2¹³⁹⁶¹² is an apocalyptic number.

It is an amenable number.

139612 is an abundant number, since it is smaller than the sum of its proper divisors (142628).

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

139612 is a wasteful number, since it uses less digits than its factorization.

139612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 199 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

The square root of 139612 is about 373.6468921321. The cubic root of 139612 is about 51.8769278811.

The spelling of 139612 in words is "one hundred thirty-nine thousand, six hundred twelve".