2605140 has 72 divisors (see below), whose sum is σ = 8117928. Its totient is φ = 675840.

The previous prime is 2605139. The next prime is 2605159. The reversal of 2605140 is 415062.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 2604996 = 12^2 + 1614^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7204 + ... + 7556.

It is an arithmetic number, because the mean of its divisors is an integer number (112749).

2^2605140 is an apocalyptic number.

2605140 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 2605140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4058964).

2605140 is an abundant number, since it is smaller than the sum of its proper divisors (5512788).

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

2605140 is a wasteful number, since it uses less digits than its factorization.

2605140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2605140 is about 1614.0446090490. The cubic root of 2605140 is about 137.5974405735.

The spelling of 2605140 in words is "two million, six hundred five thousand, one hundred forty".