265087 has 4 divisors (see below), whose sum is σ = 269640. Its totient is φ = 260536.

The previous prime is 265079. The next prime is 265091. The reversal of 265087 is 780562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780562 = 2 ⋅390281.

It is a cyclic number.

It is not a de Polignac number, because 265087 - 2³ = 265079 is a prime.

It is a super-2 number, since 2×265087² = 140542235138, which contains 22 as substring.

It is a Duffinian number.

265087 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2188 + ... + 2305.

It is an arithmetic number, because the mean of its divisors is an integer number (67410).

2²⁶⁵⁰⁸⁷ is an apocalyptic number.

265087 is a deficient number, since it is larger than the sum of its proper divisors (4553).

265087 is an equidigital number, since it uses as much as digits as its factorization.

265087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 265087 is about 514.8660019850. The cubic root of 265087 is about 64.2386112332.

The spelling of 265087 in words is "two hundred sixty-five thousand, eighty-seven".