139365 has 24 divisors (see below), whose sum is σ = 255840. Its totient is φ = 69984.

The previous prime is 139361. The next prime is 139367. The reversal of 139365 is 563931.

It is not a de Polignac number, because 139365 - 2² = 139361 is a prime.

139365 is a lucky number.

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 139365.

It is not an unprimeable number, because it can be changed into a prime (139361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 774 + ... + 936.

It is an arithmetic number, because the mean of its divisors is an integer number (10660).

2¹³⁹³⁶⁵ is an apocalyptic number.

139365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139365 is a deficient number, since it is larger than the sum of its proper divisors (116475).

139365 is a wasteful number, since it uses less digits than its factorization.

139365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 190 counting only the distinct ones).

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

The square root of 139365 is about 373.3162198459. The cubic root of 139365 is about 51.8463164600.

The spelling of 139365 in words is "one hundred thirty-nine thousand, three hundred sixty-five".