268001281 has 2 divisors, whose sum is σ = 268001282. Its totient is φ = 268001280.

The previous prime is 268001263. The next prime is 268001287. The reversal of 268001281 is 182100862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267616881 + 384400 = 16359^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 268001281 - 2¹¹ = 267999233 is a prime.

It is a super-2 number, since 2×268001281² = 143649373235281922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (268001287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134000640 + 134000641.

It is an arithmetic number, because the mean of its divisors is an integer number (134000641).

Almost surely, 2^268001281 is an apocalyptic number.

It is an amenable number.

268001281 is a deficient number, since it is larger than the sum of its proper divisors (1).

268001281 is an equidigital number, since it uses as much as digits as its factorization.

268001281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 268001281 is about 16370.7446684627. The cubic root of 268001281 is about 644.7315999637.

The spelling of 268001281 in words is "two hundred sixty-eight million, one thousand, two hundred eighty-one".