680258 has 4 divisors (see below), whose sum is σ = 1020390. Its totient is φ = 340128.

The previous prime is 680249. The next prime is 680263. The reversal of 680258 is 852086.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 667489 + 12769 = 817^2 + 113^2 .

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 680258.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680258.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170063 + ... + 170066.

2⁶⁸⁰²⁵⁸ is an apocalyptic number.

680258 is a deficient number, since it is larger than the sum of its proper divisors (340132).

680258 is a wasteful number, since it uses less digits than its factorization.

680258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340131.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 680258 is about 824.7775457661. Note that the first 3 decimals coincide. The cubic root of 680258 is about 87.9477134296.

The spelling of 680258 in words is "six hundred eighty thousand, two hundred fifty-eight".