1264434865 has 8 divisors (see below), whose sum is σ = 1535603328. Its totient is φ = 999360240.

The previous prime is 1264434859. The next prime is 1264434869. The reversal of 1264434865 is 5684344621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1264434865 - 2¹³ = 1264426673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264434869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1523001 + ... + 1523830.

It is an arithmetic number, because the mean of its divisors is an integer number (191950416).

Almost surely, 2^1264434865 is an apocalyptic number.

It is an amenable number.

1264434865 is a deficient number, since it is larger than the sum of its proper divisors (271168463).

1264434865 is an equidigital number, since it uses as much as digits as its factorization.

1264434865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046919.

The product of its digits is 552960, while the sum is 43.

The square root of 1264434865 is about 35558.8929102131. The cubic root of 1264434865 is about 1081.3480152607.

The spelling of 1264434865 in words is "one billion, two hundred sixty-four million, four hundred thirty-four thousand, eight hundred sixty-five".