2259581 has 2 divisors, whose sum is σ = 2259582. Its totient is φ = 2259580.

The previous prime is 2259571. The next prime is 2259601. The reversal of 2259581 is 1859522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1666681 + 592900 = 1291^2 + 770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2259581 is a prime.

It is a super-2 number, since 2×2259581² = 10211412591122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2259571) 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 as a sum of consecutive naturals, namely, 1129790 + 1129791.

It is an arithmetic number, because the mean of its divisors is an integer number (1129791).

2^2259581 is an apocalyptic number.

It is an amenable number.

2259581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2259581 is an equidigital number, since it uses as much as digits as its factorization.

2259581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 32.

The square root of 2259581 is about 1503.1902740505. The cubic root of 2259581 is about 131.2228013180. Note that the first 3 decimals are identical.

The spelling of 2259581 in words is "two million, two hundred fifty-nine thousand, five hundred eighty-one".