780255 has 24 divisors (see below), whose sum is σ = 1546272. Its totient is φ = 356544.

The previous prime is 780253. The next prime is 780257. The reversal of 780255 is 552087.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (780253) and next prime (780257).

It is not a de Polignac number, because 780255 - 2¹ = 780253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780253) 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, 924 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (64428).

2⁷⁸⁰²⁵⁵ is an apocalyptic number.

780255 is a deficient number, since it is larger than the sum of its proper divisors (766017).

780255 is a wasteful number, since it uses less digits than its factorization.

780255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495 (or 2492 counting only the distinct ones).

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

The square root of 780255 is about 883.3204401575. The cubic root of 780255 is about 92.0616710008.

It can be divided in two parts, 780 and 255, that added together give a triangular number (1035 = T₄₅).

The spelling of 780255 in words is "seven hundred eighty thousand, two hundred fifty-five".