139655 has 16 divisors (see below), whose sum is σ = 186624. Its totient is φ = 99840.

The previous prime is 139627. The next prime is 139661. The reversal of 139655 is 556931.

139655 = T₇₉ + T₈₀ + ... + T₁₀₉.

139655 = 23² + 24² + ... + 75².

It is not a de Polignac number, because 139655 - 2⁶ = 139591 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

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 139655.

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 15 ways as a sum of consecutive naturals, for example, 2609 + ... + 2661.

It is an arithmetic number, because the mean of its divisors is an integer number (11664).

2¹³⁹⁶⁵⁵ is an apocalyptic number.

139655 is a deficient number, since it is larger than the sum of its proper divisors (46969).

139655 is a wasteful number, since it uses less digits than its factorization.

139655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106.

The product of its digits is 4050, while the sum is 29.

The square root of 139655 is about 373.7044286599. The cubic root of 139655 is about 51.8822533043.

The spelling of 139655 in words is "one hundred thirty-nine thousand, six hundred fifty-five".