139544 has 8 divisors (see below), whose sum is σ = 261660. Its totient is φ = 69768.

The previous prime is 139537. The next prime is 139547. The reversal of 139544 is 445931.

It is a tau number, because it is divible by the number of its divisors (8).

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 139544.

It is not an unprimeable number, because it can be changed into a prime (139547) by changing a digit.

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 as a sum of consecutive naturals, namely, 8714 + ... + 8729.

2¹³⁹⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

139544 is a deficient number, since it is larger than the sum of its proper divisors (122116).

139544 is a wasteful number, since it uses less digits than its factorization.

139544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17449 (or 17445 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 139544 is about 373.5558860465. Note that the first 3 decimals coincide. The cubic root of 139544 is about 51.8685040494.

The spelling of 139544 in words is "one hundred thirty-nine thousand, five hundred forty-four".