2581140 has 24 divisors (see below), whose sum is σ = 7227360. Its totient is φ = 688288.

The previous prime is 2581133. The next prime is 2581141. The reversal of 2581140 is 411852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21450 + ... + 21569.

It is an arithmetic number, because the mean of its divisors is an integer number (301140).

2^2581140 is an apocalyptic number.

2581140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2581140 is an abundant number, since it is smaller than the sum of its proper divisors (4646220).

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

2581140 is a wasteful number, since it uses less digits than its factorization.

2581140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43031 (or 43029 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 2581140 is about 1606.5926677288. The cubic root of 2581140 is about 137.1735949208.

Adding to 2581140 its reverse (411852), we get a palindrome (2992992).

The spelling of 2581140 in words is "two million, five hundred eighty-one thousand, one hundred forty".