2581040 has 80 divisors (see below), whose sum is σ = 7499520. Its totient is φ = 802560.

The previous prime is 2581031. The next prime is 2581049. The reversal of 2581040 is 401852.

It is an interprime number because it is at equal distance from previous prime (2581031) and next prime (2581049).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2581049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5951 + ... + 6369.

It is an arithmetic number, because the mean of its divisors is an integer number (93744).

2^2581040 is an apocalyptic number.

2581040 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 2581040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3749760).

2581040 is an abundant number, since it is smaller than the sum of its proper divisors (4918480).

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

2581040 is a wasteful number, since it uses less digits than its factorization.

2581040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2581040 is about 1606.5615456620. The cubic root of 2581040 is about 137.1718234120.

Adding to 2581040 its reverse (401852), we get a palindrome (2982892).

The spelling of 2581040 in words is "two million, five hundred eighty-one thousand, forty".