139635 has 24 divisors (see below), whose sum is σ = 252720. Its totient is φ = 71232.

The previous prime is 139627. The next prime is 139661. The reversal of 139635 is 536931.

It is not a de Polignac number, because 139635 - 2³ = 139627 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 139599 and 139608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1252 + ... + 1358.

It is an arithmetic number, because the mean of its divisors is an integer number (10530).

2¹³⁹⁶³⁵ is an apocalyptic number.

139635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139635 is a deficient number, since it is larger than the sum of its proper divisors (113085).

139635 is a wasteful number, since it uses less digits than its factorization.

139635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 144 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 139635 is about 373.6776685862. The cubic root of 139635 is about 51.8797764993.

It can be divided in two parts, 1396 and 35, that added together give a triangular number (1431 = T₅₃).

The spelling of 139635 in words is "one hundred thirty-nine thousand, six hundred thirty-five".