139012 has 12 divisors (see below), whose sum is σ = 254016. Its totient is φ = 66440.

The previous prime is 138977. The next prime is 139021. The reversal of 139012 is 210931.

It is a super-2 number, since 2×139012² = 38648672288, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 664 + ... + 847.

It is an arithmetic number, because the mean of its divisors is an integer number (21168).

2¹³⁹⁰¹² is an apocalyptic number.

It is an amenable number.

139012 is a deficient number, since it is larger than the sum of its proper divisors (115004).

139012 is a wasteful number, since it uses less digits than its factorization.

139012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538 (or 1536 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 139012 is about 372.8431305522. The cubic root of 139012 is about 51.8025053076.

Adding to 139012 its reverse (210931), we get a palindrome (349943).

It can be divided in two parts, 13 and 9012, that added together give a square (9025 = 95²).

The spelling of 139012 in words is "one hundred thirty-nine thousand, twelve".