2587261 has 4 divisors (see below), whose sum is σ = 2590524. Its totient is φ = 2584000.

The previous prime is 2587253. The next prime is 2587271. The reversal of 2587261 is 1627852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 319225 + 2268036 = 565^2 + 1506^2 .

It is a cyclic number.

It is not a de Polignac number, because 2587261 - 2³ = 2587253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2587271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (647631).

2^2587261 is an apocalyptic number.

It is an amenable number.

2587261 is a deficient number, since it is larger than the sum of its proper divisors (3263).

2587261 is a wasteful number, since it uses less digits than its factorization.

2587261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262.

The product of its digits is 6720, while the sum is 31.

The square root of 2587261 is about 1608.4965029493. The cubic root of 2587261 is about 137.2819419730.

The spelling of 2587261 in words is "two million, five hundred eighty-seven thousand, two hundred sixty-one".