2591026 has 4 divisors (see below), whose sum is σ = 3886542. Its totient is φ = 1295512.

The previous prime is 2591023. The next prime is 2591027. The reversal of 2591026 is 6201952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2556801 + 34225 = 1599^2 + 185^2 .

It is not an unprimeable number, because it can be changed into a prime (2591023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647755 + ... + 647758.

2^2591026 is an apocalyptic number.

2591026 is a deficient number, since it is larger than the sum of its proper divisors (1295516).

2591026 is a wasteful number, since it uses less digits than its factorization.

2591026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295515.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2591026 is about 1609.6664250707. Note that the first 3 decimals coincide. The cubic root of 2591026 is about 137.3485009064.

Adding to 2591026 its reverse (6201952), we get a palindrome (8792978).

The spelling of 2591026 in words is "two million, five hundred ninety-one thousand, twenty-six".