1264396287 has 64 divisors (see below), whose sum is σ = 2284093440. Its totient is φ = 602121600.

The previous prime is 1264396229. The next prime is 1264396307. The reversal of 1264396287 is 7826934621.

It is not a de Polignac number, because 1264396287 - 2¹⁶ = 1264330751 is a prime.

It is a super-3 number, since 3×1264396287³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264396387) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131413 + ... + 140705.

It is an arithmetic number, because the mean of its divisors is an integer number (35688960).

Almost surely, 2^1264396287 is an apocalyptic number.

1264396287 is a deficient number, since it is larger than the sum of its proper divisors (1019697153).

1264396287 is a wasteful number, since it uses less digits than its factorization.

1264396287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9364.

The product of its digits is 870912, while the sum is 48.

The square root of 1264396287 is about 35558.3504538667. The cubic root of 1264396287 is about 1081.3370178132.

The spelling of 1264396287 in words is "one billion, two hundred sixty-four million, three hundred ninety-six thousand, two hundred eighty-seven".