425785 has 16 divisors (see below), whose sum is σ = 548352. Its totient is φ = 316800.

The previous prime is 425783. The next prime is 425791. The reversal of 425785 is 587524.

425785 = T₁₅₀ + T₁₅₁ + ... + T₁₈₀.

It is not a de Polignac number, because 425785 - 2¹ = 425783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

425785 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (425783) 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 15 ways as a sum of consecutive naturals, for example, 6322 + ... + 6388.

It is an arithmetic number, because the mean of its divisors is an integer number (34272).

2⁴²⁵⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

425785 is a deficient number, since it is larger than the sum of its proper divisors (122567).

425785 is a wasteful number, since it uses less digits than its factorization.

425785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144.

The product of its digits is 11200, while the sum is 31.

The square root of 425785 is about 652.5220302794. The cubic root of 425785 is about 75.2309915454.

The spelling of 425785 in words is "four hundred twenty-five thousand, seven hundred eighty-five".