2445581 has 2 divisors, whose sum is σ = 2445582. Its totient is φ = 2445580.

The previous prime is 2445577. The next prime is 2445601. The reversal of 2445581 is 1855442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2418025 + 27556 = 1555^2 + 166^2 .

It is a cyclic number.

It is not a de Polignac number, because 2445581 - 2² = 2445577 is a prime.

It is a super-2 number, since 2×2445581² = 11961732855122, 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 (2445571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1222790 + 1222791.

It is an arithmetic number, because the mean of its divisors is an integer number (1222791).

2^2445581 is an apocalyptic number.

It is an amenable number.

2445581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2445581 is an equidigital number, since it uses as much as digits as its factorization.

2445581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 29.

The square root of 2445581 is about 1563.8353493894. The cubic root of 2445581 is about 134.7288751516.

The spelling of 2445581 in words is "two million, four hundred forty-five thousand, five hundred eighty-one".