2664281 has 4 divisors (see below), whose sum is σ = 2700852. Its totient is φ = 2627712.

The previous prime is 2664271. The next prime is 2664293. The reversal of 2664281 is 1824662.

2664281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 366025 = 1516^2 + 605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2664281 is a prime.

It is a super-2 number, since 2×2664281² = 14196786493922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2664241) 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 in 3 ways as a sum of consecutive naturals, for example, 18176 + ... + 18321.

It is an arithmetic number, because the mean of its divisors is an integer number (675213).

2^2664281 is an apocalyptic number.

It is an amenable number.

2664281 is a deficient number, since it is larger than the sum of its proper divisors (36571).

2664281 is an equidigital number, since it uses as much as digits as its factorization.

2664281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36570.

The product of its digits is 4608, while the sum is 29.

The square root of 2664281 is about 1632.2625401571. The cubic root of 2664281 is about 138.6308893101.

The spelling of 2664281 in words is "two million, six hundred sixty-four thousand, two hundred eighty-one".