2301581 has 2 divisors, whose sum is σ = 2301582. Its totient is φ = 2301580.

The previous prime is 2301571. The next prime is 2301589. The reversal of 2301581 is 1851032.

2301581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1416100 + 885481 = 1190^2 + 941^2 .

It is a cyclic number.

It is not a de Polignac number, because 2301581 - 2¹⁸ = 2039437 is a prime.

It is a super-2 number, since 2×2301581² = 10594550199122, 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 (2301589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1150790 + 1150791.

It is an arithmetic number, because the mean of its divisors is an integer number (1150791).

2^2301581 is an apocalyptic number.

It is an amenable number.

2301581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2301581 is an equidigital number, since it uses as much as digits as its factorization.

2301581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2301581 is about 1517.0962395313. The cubic root of 2301581 is about 132.0308506098.

It can be divided in two parts, 2301 and 581, that added together give a palindrome (2882).

The spelling of 2301581 in words is "two million, three hundred one thousand, five hundred eighty-one".