425999 has 8 divisors (see below), whose sum is σ = 512640. Its totient is φ = 345816.

The previous prime is 425989. The next prime is 426007. The reversal of 425999 is 999524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425999 is a prime.

It is a Duffinian number.

425999 is a modest number, since divided by 999 gives 425 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1469 + ... + 1734.

It is an arithmetic number, because the mean of its divisors is an integer number (64080).

2⁴²⁵⁹⁹⁹ is an apocalyptic number.

425999 is a deficient number, since it is larger than the sum of its proper divisors (86641).

425999 is a wasteful number, since it uses less digits than its factorization.

425999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229.

The product of its digits is 29160, while the sum is 38.

The square root of 425999 is about 652.6859888185. The cubic root of 425999 is about 75.2435931603.

The spelling of 425999 in words is "four hundred twenty-five thousand, nine hundred ninety-nine".