425820 has 48 divisors (see below), whose sum is σ = 1225728. Its totient is φ = 110400.

The previous prime is 425819. The next prime is 425837. The reversal of 425820 is 28524.

It is a congruent number.

It is an unprimeable 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 in 15 ways as a sum of consecutive naturals, for example, 2745 + ... + 2895.

It is an arithmetic number, because the mean of its divisors is an integer number (25536).

2⁴²⁵⁸²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 425820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (612864).

425820 is an abundant number, since it is smaller than the sum of its proper divisors (799908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

425820 is a wasteful number, since it uses less digits than its factorization.

425820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 425820 is about 652.5488487462. The cubic root of 425820 is about 75.2330528460.

It can be divided in two parts, 4258 and 20, that added together give a triangular number (4278 = T₉₂).

The spelling of 425820 in words is "four hundred twenty-five thousand, eight hundred twenty".