1268264287 has 4 divisors (see below), whose sum is σ = 1271720416. Its totient is φ = 1264808160.

The previous prime is 1268264273. The next prime is 1268264303. The reversal of 1268264287 is 7824628621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7824628621 = 19 ⋅411822559.

It is a cyclic number.

It is not a de Polignac number, because 1268264287 - 2¹⁵ = 1268231519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268264227) 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 in 3 ways as a sum of consecutive naturals, for example, 1727514 + ... + 1728247.

It is an arithmetic number, because the mean of its divisors is an integer number (317930104).

Almost surely, 2^1268264287 is an apocalyptic number.

1268264287 is a deficient number, since it is larger than the sum of its proper divisors (3456129).

1268264287 is an equidigital number, since it uses as much as digits as its factorization.

1268264287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456128.

The product of its digits is 516096, while the sum is 46.

The square root of 1268264287 is about 35612.6983953758. The cubic root of 1268264287 is about 1082.4385589884.

The spelling of 1268264287 in words is "one billion, two hundred sixty-eight million, two hundred sixty-four thousand, two hundred eighty-seven".