2064581 has 2 divisors, whose sum is σ = 2064582. Its totient is φ = 2064580.

The previous prime is 2064571. The next prime is 2064583. The reversal of 2064581 is 1854602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 919681 = 1070^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 2064581 - 2¹⁰ = 2063557 is a prime.

It is a super-4 number, since 4×2064581⁴ (a number of 26 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 2064583, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2064581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2064583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032290 + 1032291.

It is an arithmetic number, because the mean of its divisors is an integer number (1032291).

2^2064581 is an apocalyptic number.

It is an amenable number.

2064581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2064581 is an equidigital number, since it uses as much as digits as its factorization.

2064581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2064581 is about 1436.8649901783. The cubic root of 2064581 is about 127.3338808001. Note that the first 3 decimals are identical.

The spelling of 2064581 in words is "two million, sixty-four thousand, five hundred eighty-one".