425806 has 4 divisors (see below), whose sum is σ = 638712. Its totient is φ = 212902.

The previous prime is 425801. The next prime is 425813. The reversal of 425806 is 608524.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425801) by changing a digit.

425806 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 106450 + ... + 106453.

It is an arithmetic number, because the mean of its divisors is an integer number (159678).

2⁴²⁵⁸⁰⁶ is an apocalyptic number.

425806 is a deficient number, since it is larger than the sum of its proper divisors (212906).

425806 is a wasteful number, since it uses less digits than its factorization.

425806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212905.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 425806 is about 652.5381214918. The cubic root of 425806 is about 75.2322283393.

The spelling of 425806 in words is "four hundred twenty-five thousand, eight hundred six".