78255 has 24 divisors (see below), whose sum is σ = 142272. Its totient is φ = 39744.

The previous prime is 78241. The next prime is 78259. The reversal of 78255 is 55287.

It is a happy number.

It is not a de Polignac number, because 78255 - 2⁶ = 78191 is a prime.

It is a super-2 number, since 2×78255² = 12247690050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78259) 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, 1642 + ... + 1688.

It is an arithmetic number, because the mean of its divisors is an integer number (5928).

2⁷⁸²⁵⁵ is an apocalyptic number.

78255 is a deficient number, since it is larger than the sum of its proper divisors (64017).

78255 is a wasteful number, since it uses less digits than its factorization.

78255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 92 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 78255 is about 279.7409515963. The cubic root of 78255 is about 42.7730971935.

It can be divided in two parts, 78 and 255, that added together give a palindrome (333).

The spelling of 78255 in words is "seventy-eight thousand, two hundred fifty-five".