680245 has 8 divisors (see below), whose sum is σ = 838584. Its totient is φ = 529344.

The previous prime is 680237. The next prime is 680249. The reversal of 680245 is 542086.

It can be written as a sum of positive squares in 4 ways, for example, as 288369 + 391876 = 537^2 + 626^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 680245 - 2³ = 680237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654 + ... + 2023.

It is an arithmetic number, because the mean of its divisors is an integer number (104823).

2⁶⁸⁰²⁴⁵ is an apocalyptic number.

It is an amenable number.

680245 is a deficient number, since it is larger than the sum of its proper divisors (158339).

680245 is a wasteful number, since it uses less digits than its factorization.

680245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 680245 is about 824.7696648156. The cubic root of 680245 is about 87.9471531875.

The spelling of 680245 in words is "six hundred eighty thousand, two hundred forty-five".