425624 has 16 divisors (see below), whose sum is σ = 808920. Its totient is φ = 209920.

The previous prime is 425609. The next prime is 425641. The reversal of 425624 is 426524.

It is a self number, because there is not a number n which added to its sum of digits gives 425624.

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 425624.

It is an unprimeable number.

425624 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344 + ... + 984.

2⁴²⁵⁶²⁴ is an apocalyptic number.

It is an amenable number.

425624 is a deficient number, since it is larger than the sum of its proper divisors (383296).

425624 is a wasteful number, since it uses less digits than its factorization.

425624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 726 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 425624 is about 652.3986511329. The cubic root of 425624 is about 75.2215081077.

Subtracting 425624 from its reverse (426524), we obtain a square (900 = 30²).

The spelling of 425624 in words is "four hundred twenty-five thousand, six hundred twenty-four".