2580639 has 16 divisors (see below), whose sum is σ = 3596928. Its totient is φ = 1644192.

The previous prime is 2580631. The next prime is 2580647. The reversal of 2580639 is 9360852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2580631) and next prime (2580647).

It is not a de Polignac number, because 2580639 - 2³ = 2580631 is a prime.

It is an Ulam number.

2580639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2580631) 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, 7264 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (224808).

2^2580639 is an apocalyptic number.

2580639 is a deficient number, since it is larger than the sum of its proper divisors (1016289).

2580639 is a wasteful number, since it uses less digits than its factorization.

2580639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 2580639 is about 1606.4367401177. The cubic root of 2580639 is about 137.1647192020.

The spelling of 2580639 in words is "two million, five hundred eighty thousand, six hundred thirty-nine".