425979 has 12 divisors (see below), whose sum is σ = 638456. Its totient is φ = 283824.

The previous prime is 425977. The next prime is 425987. The reversal of 425979 is 979524.

It is not a de Polignac number, because 425979 - 2¹ = 425977 is a prime.

It is a Duffinian number.

425979 is a lucky number.

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 425979.

It is not an unprimeable number, because it can be changed into a prime (425977) 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, 634 + ... + 1119.

2⁴²⁵⁹⁷⁹ is an apocalyptic number.

425979 is a deficient number, since it is larger than the sum of its proper divisors (212477).

425979 is an equidigital number, since it uses as much as digits as its factorization.

425979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768 (or 1756 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 425979 is about 652.6706673354. The cubic root of 425979 is about 75.2424156181.

The spelling of 425979 in words is "four hundred twenty-five thousand, nine hundred seventy-nine".