265515 has 16 divisors (see below), whose sum is σ = 439296. Its totient is φ = 136800.

The previous prime is 265513. The next prime is 265541. The reversal of 265515 is 515562.

It is not a de Polignac number, because 265515 - 2¹ = 265513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (27456).

2²⁶⁵⁵¹⁵ is an apocalyptic number.

265515 is a deficient number, since it is larger than the sum of its proper divisors (173781).

265515 is a wasteful number, since it uses less digits than its factorization.

265515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610.

The product of its digits is 1500, while the sum is 24.

The square root of 265515 is about 515.2814764767. The cubic root of 265515 is about 64.2731650989.

Subtracting 265515 from its reverse (515562), we obtain a cube (250047 = 63³).

It can be divided in two parts, 265 and 515, that added together give a triangular number (780 = T₃₉).

The spelling of 265515 in words is "two hundred sixty-five thousand, five hundred fifteen".