681250 has 24 divisors (see below), whose sum is σ = 1288980. Its totient is φ = 270000.

The previous prime is 681229. The next prime is 681251. The reversal of 681250 is 52186.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 42849 + 638401 = 207^2 + 799^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (681251) 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, 6196 + ... + 6304.

2⁶⁸¹²⁵⁰ is an apocalyptic number.

681250 is a deficient number, since it is larger than the sum of its proper divisors (607730).

681250 is an equidigital number, since it uses as much as digits as its factorization.

681250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 681250 is about 825.3787009610. The cubic root of 681250 is about 87.9904431770.

The spelling of 681250 in words is "six hundred eighty-one thousand, two hundred fifty".