2559820 has 24 divisors (see below), whose sum is σ = 5418000. Its totient is φ = 1015872.

The previous prime is 2559811. The next prime is 2559827. The reversal of 2559820 is 289552.

It is a happy number.

2559820 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2559827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2551 + ... + 3409.

It is an arithmetic number, because the mean of its divisors is an integer number (225750).

2^2559820 is an apocalyptic number.

2559820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2559820 is an abundant number, since it is smaller than the sum of its proper divisors (2858180).

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

2559820 is a wasteful number, since it uses less digits than its factorization.

2559820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2559820 is about 1599.9437490112. The cubic root of 2559820 is about 136.7948694541.

The spelling of 2559820 in words is "two million, five hundred fifty-nine thousand, eight hundred twenty".