425985 has 16 divisors (see below), whose sum is σ = 779136. Its totient is φ = 194688.

The previous prime is 425977. The next prime is 425987. The reversal of 425985 is 589524.

It is not a de Polignac number, because 425985 - 2³ = 425977 is a prime.

It is a Curzon number.

425985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (425987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1924 + ... + 2133.

It is an arithmetic number, because the mean of its divisors is an integer number (48696).

It is a Proth number, since it is equal to 13 ⋅ 2¹⁵ + 1 and 13 < 2¹⁵.

2⁴²⁵⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

425985 is a deficient number, since it is larger than the sum of its proper divisors (353151).

425985 is a wasteful number, since it uses less digits than its factorization.

425985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072.

The product of its digits is 14400, while the sum is 33.

The square root of 425985 is about 652.6752638181. The cubic root of 425985 is about 75.2427688846.

The spelling of 425985 in words is "four hundred twenty-five thousand, nine hundred eighty-five".