1267801264 has 20 divisors (see below), whose sum is σ = 2457632880. Its totient is φ = 633573440.

The previous prime is 1267801253. The next prime is 1267801279. The reversal of 1267801264 is 4621087621.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 13194 + ... + 52054.

It is an arithmetic number, because the mean of its divisors is an integer number (122881644).

Almost surely, 2^1267801264 is an apocalyptic number.

It is an amenable number.

1267801264 is a deficient number, since it is larger than the sum of its proper divisors (1189831616).

1267801264 is a wasteful number, since it uses less digits than its factorization.

1267801264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40908 (or 40902 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1267801264 is about 35606.1969887266. The cubic root of 1267801264 is about 1082.3068159548.

Adding to 1267801264 its reverse (4621087621), we get a palindrome (5888888885).

The spelling of 1267801264 in words is "one billion, two hundred sixty-seven million, eight hundred one thousand, two hundred sixty-four".