2559720 has 64 divisors (see below), whose sum is σ = 7801920. Its totient is φ = 671744.

The previous prime is 2559703. The next prime is 2559721. The reversal of 2559720 is 279552.

It is a happy number.

2559720 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 a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2559721) 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 15 ways as a sum of consecutive naturals, for example, 9832 + ... + 10088.

It is an arithmetic number, because the mean of its divisors is an integer number (121905).

2^2559720 is an apocalyptic number.

2559720 is a gapful number since it is divisible by the number (20) 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 2559720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3900960).

2559720 is an abundant number, since it is smaller than the sum of its proper divisors (5242200).

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

2559720 is a wasteful number, since it uses less digits than its factorization.

2559720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 2559720 is about 1599.9124976073. The cubic root of 2559720 is about 136.7930881224.

The spelling of 2559720 in words is "two million, five hundred fifty-nine thousand, seven hundred twenty".