1264700917 has 4 divisors (see below), whose sum is σ = 1265555200. Its totient is φ = 1263846636.

The previous prime is 1264700909. The next prime is 1264700989. The reversal of 1264700917 is 7190074621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1264700917 - 2³ = 1264700909 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 (1264700317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424917 + ... + 427882.

It is an arithmetic number, because the mean of its divisors is an integer number (316388800).

Almost surely, 2^1264700917 is an apocalyptic number.

It is an amenable number.

1264700917 is a deficient number, since it is larger than the sum of its proper divisors (854283).

1264700917 is an equidigital number, since it uses as much as digits as its factorization.

1264700917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854282.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 1264700917 is about 35562.6337185535. The cubic root of 1264700917 is about 1081.4238527315.

The spelling of 1264700917 in words is "one billion, two hundred sixty-four million, seven hundred thousand, nine hundred seventeen".