255769 has 4 divisors (see below), whose sum is σ = 257040. Its totient is φ = 254500.

The previous prime is 255767. The next prime is 255803. The reversal of 255769 is 967552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255769 - 2¹ = 255767 is a prime.

It is a super-2 number, since 2×255769² = 130835562722, which contains 22 as substring.

It is a Duffinian number.

255769 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (255763) 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, 259 + ... + 760.

It is an arithmetic number, because the mean of its divisors is an integer number (64260).

2²⁵⁵⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

255769 is a deficient number, since it is larger than the sum of its proper divisors (1271).

255769 is a wasteful number, since it uses less digits than its factorization.

255769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270.

The product of its digits is 18900, while the sum is 34.

The square root of 255769 is about 505.7360971890. The cubic root of 255769 is about 63.4769379125.

It can be divided in two parts, 255 and 769, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 255769 in words is "two hundred fifty-five thousand, seven hundred sixty-nine".