681225 has 24 divisors (see below), whose sum is σ = 1166592. Its totient is φ = 350400.

The previous prime is 681221. The next prime is 681229. The reversal of 681225 is 522186.

It is an interprime number because it is at equal distance from previous prime (681221) and next prime (681229).

It is not a de Polignac number, because 681225 - 2² = 681221 is a prime.

681225 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 681195 and 681204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2179 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (48608).

2⁶⁸¹²²⁵ is an apocalyptic number.

It is an amenable number.

681225 is a deficient number, since it is larger than the sum of its proper divisors (485367).

681225 is a wasteful number, since it uses less digits than its factorization.

681225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 332 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 681225 is about 825.3635562587. The cubic root of 681225 is about 87.9893668282.

The spelling of 681225 in words is "six hundred eighty-one thousand, two hundred twenty-five".