265139 has 8 divisors (see below), whose sum is σ = 309600. Its totient is φ = 226968.

The previous prime is 265129. The next prime is 265141. The reversal of 265139 is 931562.

It is not a de Polignac number, because 265139 - 2⁴ = 265123 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 265139.

It is not an unprimeable number, because it can be changed into a prime (265129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44 + ... + 729.

It is an arithmetic number, because the mean of its divisors is an integer number (38700).

2²⁶⁵¹³⁹ is an apocalyptic number.

265139 is a deficient number, since it is larger than the sum of its proper divisors (44461).

265139 is an frugal number, since it uses more digits than its factorization.

265139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 780 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 265139 is about 514.9164980849. The cubic root of 265139 is about 64.2428113503.

It can be divided in two parts, 265 and 139, that added together give a palindrome (404).

The spelling of 265139 in words is "two hundred sixty-five thousand, one hundred thirty-nine".