2559940 has 12 divisors (see below), whose sum is σ = 5375916. Its totient is φ = 1023968.

The previous prime is 2559937. The next prime is 2559959. The reversal of 2559940 is 499552.

2559940 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 can be written as a sum of positive squares in 2 ways, for example, as 1444804 + 1115136 = 1202^2 + 1056^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2559896 and 2559905.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63979 + ... + 64018.

It is an arithmetic number, because the mean of its divisors is an integer number (447993).

2^2559940 is an apocalyptic number.

2559940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2559940 is an abundant number, since it is smaller than the sum of its proper divisors (2815976).

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

2559940 is a wasteful number, since it uses less digits than its factorization.

2559940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128006 (or 128004 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 2559940 is about 1599.9812498901. The cubic root of 2559940 is about 136.7970069908.

The spelling of 2559940 in words is "two million, five hundred fifty-nine thousand, nine hundred forty".