2580261 has 4 divisors (see below), whose sum is σ = 3440352. Its totient is φ = 1720172.

The previous prime is 2580251. The next prime is 2580287. The reversal of 2580261 is 1620852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2580261 - 2⁶ = 2580197 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2580241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 430041 + ... + 430046.

It is an arithmetic number, because the mean of its divisors is an integer number (860088).

2^2580261 is an apocalyptic number.

It is an amenable number.

2580261 is a deficient number, since it is larger than the sum of its proper divisors (860091).

2580261 is an equidigital number, since it uses as much as digits as its factorization.

2580261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860090.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2580261 is about 1606.3190841175. The cubic root of 2580261 is about 137.1580217916.

It can be divided in two parts, 2580 and 261, that multiplied together give a triangular number (673380 = T₁₁₆₀).

The spelling of 2580261 in words is "two million, five hundred eighty thousand, two hundred sixty-one".