425684 has 24 divisors (see below), whose sum is σ = 889728. Its totient is φ = 174240.

The previous prime is 425681. The next prime is 425701. The reversal of 425684 is 486524.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425684.

It is not an unprimeable number, because it can be changed into a prime (425681) 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, 314 + ... + 974.

It is an arithmetic number, because the mean of its divisors is an integer number (37072).

2⁴²⁵⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 425684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444864).

425684 is an abundant number, since it is smaller than the sum of its proper divisors (464044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

425684 is a wasteful number, since it uses less digits than its factorization.

425684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 693 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 425684 is about 652.4446336663. Note that the first 3 decimals coincide. The cubic root of 425684 is about 75.2250425876.

The spelling of 425684 in words is "four hundred twenty-five thousand, six hundred eighty-four".