2591226 has 48 divisors (see below), whose sum is σ = 6402240. Its totient is φ = 749760.

The previous prime is 2591213. The next prime is 2591233. The reversal of 2591226 is 6221952.

2591226 is a nontrivial binomial coefficient, being equal to C(2277, 2).

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2591226.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4270 + ... + 4838.

It is an arithmetic number, because the mean of its divisors is an integer number (133380).

2^2591226 is an apocalyptic number.

2591226 is the 2276-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2591226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3201120).

2591226 is an abundant number, since it is smaller than the sum of its proper divisors (3811014).

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

2591226 is a wasteful number, since it uses less digits than its factorization.

2591226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 608 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 2591226 is about 1609.7285485448. The cubic root of 2591226 is about 137.3520347695.

It can be divided in two parts, 259 and 1226, that added together give a triangular number (1485 = T₅₄).

The spelling of 2591226 in words is "two million, five hundred ninety-one thousand, two hundred twenty-six".