2555240 has 32 divisors (see below), whose sum is σ = 5806080. Its totient is φ = 1012032.

The previous prime is 2555233. The next prime is 2555251. The reversal of 2555240 is 425552.

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 7 ways as a sum of consecutive naturals, for example, 4829 + ... + 5331.

It is an arithmetic number, because the mean of its divisors is an integer number (181440).

2^2555240 is an apocalyptic number.

2555240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2555240 is an abundant number, since it is smaller than the sum of its proper divisors (3250840).

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

2555240 is a wasteful number, since it uses less digits than its factorization.

2555240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 2555240 is about 1598.5118079013. The cubic root of 2555240 is about 136.7132368226.

The spelling of 2555240 in words is "two million, five hundred fifty-five thousand, two hundred forty".