2561026 has 12 divisors (see below), whose sum is σ = 4160322. Its totient is φ = 1181856.

The previous prime is 2561023. The next prime is 2561051. The reversal of 2561026 is 6201652.

It can be written as a sum of positive squares in 3 ways, for example, as 455625 + 2105401 = 675^2 + 1451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2560988 and 2561006.

It is not an unprimeable number, because it can be changed into a prime (2561021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3451 + ... + 4126.

2^2561026 is an apocalyptic number.

2561026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2561026 is a deficient number, since it is larger than the sum of its proper divisors (1599296).

2561026 is a wasteful number, since it uses less digits than its factorization.

2561026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605 (or 7592 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2561026 is about 1600.3205928813. The cubic root of 2561026 is about 136.8163486611.

Adding to 2561026 its reverse (6201652), we get a palindrome (8762678).

The spelling of 2561026 in words is "two million, five hundred sixty-one thousand, twenty-six".