1264504785 has 32 divisors (see below), whose sum is σ = 2086801920. Its totient is φ = 653361408.

The previous prime is 1264504783. The next prime is 1264504799. The reversal of 1264504785 is 5874054621.

It is a happy number.

It is not a de Polignac number, because 1264504785 - 2¹ = 1264504783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264504783) 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 31 ways as a sum of consecutive naturals, for example, 127879 + ... + 137411.

It is an arithmetic number, because the mean of its divisors is an integer number (65212560).

Almost surely, 2^1264504785 is an apocalyptic number.

1264504785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264504785 is a deficient number, since it is larger than the sum of its proper divisors (822297135).

1264504785 is a wasteful number, since it uses less digits than its factorization.

1264504785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9817.

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 1264504785 is about 35559.8760543397. The cubic root of 1264504785 is about 1081.3679468158.

The spelling of 1264504785 in words is "one billion, two hundred sixty-four million, five hundred four thousand, seven hundred eighty-five".