2285581 has 2 divisors, whose sum is σ = 2285582. Its totient is φ = 2285580.

The previous prime is 2285551. The next prime is 2285587. The reversal of 2285581 is 1855822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2223081 + 62500 = 1491^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2285581 - 2⁹ = 2285069 is a prime.

It is a super-3 number, since 3×2285581³ = 35818806103055333823, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2285587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1142790 + 1142791.

It is an arithmetic number, because the mean of its divisors is an integer number (1142791).

2^2285581 is an apocalyptic number.

It is an amenable number.

2285581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2285581 is an equidigital number, since it uses as much as digits as its factorization.

2285581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6400, while the sum is 31.

The square root of 2285581 is about 1511.8138112876. The cubic root of 2285581 is about 131.7241907132.

The spelling of 2285581 in words is "two million, two hundred eighty-five thousand, five hundred eighty-one".