6425820 has 72 divisors (see below), whose sum is σ = 20180160. Its totient is φ = 1653120.

The previous prime is 6425789. The next prime is 6425833. The reversal of 6425820 is 285246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4605 + ... + 5835.

It is an arithmetic number, because the mean of its divisors is an integer number (280280).

Almost surely, 2^6425820 is an apocalyptic number.

6425820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6425820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10090080).

6425820 is an abundant number, since it is smaller than the sum of its proper divisors (13754340).

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

6425820 is a wasteful number, since it uses less digits than its factorization.

6425820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 6425820 is about 2534.9201170846. The cubic root of 6425820 is about 185.9128971284.

The spelling of 6425820 in words is "six million, four hundred twenty-five thousand, eight hundred twenty".