690255 has 16 divisors (see below), whose sum is σ = 1227360. Its totient is φ = 368064.

The previous prime is 690233. The next prime is 690259. The reversal of 690255 is 552096.

It is not a de Polignac number, because 690255 - 2⁷ = 690127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690259) 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, 2422 + ... + 2691.

It is an arithmetic number, because the mean of its divisors is an integer number (76710).

2⁶⁹⁰²⁵⁵ is an apocalyptic number.

690255 is a deficient number, since it is larger than the sum of its proper divisors (537105).

690255 is a wasteful number, since it uses less digits than its factorization.

690255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5127 (or 5121 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 690255 is about 830.8158640758. The cubic root of 690255 is about 88.3764434957.

The spelling of 690255 in words is "six hundred ninety thousand, two hundred fifty-five".