680121 has 12 divisors (see below), whose sum is σ = 1058148. Its totient is φ = 418464.

The previous prime is 680107. The next prime is 680123. The reversal of 680121 is 121086.

It can be written as a sum of positive squares in 2 ways, for example, as 275625 + 404496 = 525^2 + 636^2 .

It is not a de Polignac number, because 680121 - 2⁷ = 679993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680094 and 680103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2790 + ... + 3023.

It is an arithmetic number, because the mean of its divisors is an integer number (88179).

2⁶⁸⁰¹²¹ is an apocalyptic number.

It is an amenable number.

680121 is a deficient number, since it is larger than the sum of its proper divisors (378027).

680121 is a wasteful number, since it uses less digits than its factorization.

680121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832 (or 5829 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 680121 is about 824.6944888866. The cubic root of 680121 is about 87.9418089808.

The spelling of 680121 in words is "six hundred eighty thousand, one hundred twenty-one".