681245 has 16 divisors (see below), whose sum is σ = 881280. Its totient is φ = 504000.

The previous prime is 681229. The next prime is 681251. The reversal of 681245 is 542186.

681245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681245 - 2⁴ = 681229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6695 + ... + 6795.

It is an arithmetic number, because the mean of its divisors is an integer number (55080).

2⁶⁸¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

681245 is a deficient number, since it is larger than the sum of its proper divisors (200035).

681245 is a wasteful number, since it uses less digits than its factorization.

681245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

The product of its digits is 1920, while the sum is 26.

The square root of 681245 is about 825.3756720427. The cubic root of 681245 is about 87.9902279094.

The spelling of 681245 in words is "six hundred eighty-one thousand, two hundred forty-five".