64274281 has 2 divisors, whose sum is σ = 64274282. Its totient is φ = 64274280.

The previous prime is 64274269. The next prime is 64274299. The reversal of 64274281 is 18247246.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 12362256 = 7205^2 + 3516^2 .

It is a cyclic number.

It is not a de Polignac number, because 64274281 - 2⁷ = 64274153 is a prime.

It is a super-2 number, since 2×64274281² = 8262366396133922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64274251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32137140 + 32137141.

It is an arithmetic number, because the mean of its divisors is an integer number (32137141).

Almost surely, 2^64274281 is an apocalyptic number.

It is an amenable number.

64274281 is a deficient number, since it is larger than the sum of its proper divisors (1).

64274281 is an equidigital number, since it uses as much as digits as its factorization.

64274281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

The square root of 64274281 is about 8017.1242350359. The cubic root of 64274281 is about 400.5706043895.

The spelling of 64274281 in words is "sixty-four million, two hundred seventy-four thousand, two hundred eighty-one".