425817 has 20 divisors (see below), whose sum is σ = 727936. Its totient is φ = 243000.

The previous prime is 425813. The next prime is 425819. The reversal of 425817 is 718524.

It is not a de Polignac number, because 425817 - 2² = 425813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

425817 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425817.

It is not an unprimeable number, because it can be changed into a prime (425813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 192 + ... + 942.

2⁴²⁵⁸¹⁷ is an apocalyptic number.

It is an amenable number.

425817 is a deficient number, since it is larger than the sum of its proper divisors (302119).

425817 is an equidigital number, since it uses as much as digits as its factorization.

425817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 761 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 425817 is about 652.5465500637. The cubic root of 425817 is about 75.2328761675.

The spelling of 425817 in words is "four hundred twenty-five thousand, eight hundred seventeen".