1264813345 has 32 divisors (see below), whose sum is σ = 1653644160. Its totient is φ = 925117440.

The previous prime is 1264813313. The next prime is 1264813357. The reversal of 1264813345 is 5433184621.

It is not a de Polignac number, because 1264813345 - 2⁵ = 1264813313 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 428886 + ... + 431824.

It is an arithmetic number, because the mean of its divisors is an integer number (51676380).

Almost surely, 2^1264813345 is an apocalyptic number.

It is an amenable number.

1264813345 is a deficient number, since it is larger than the sum of its proper divisors (388830815).

1264813345 is a wasteful number, since it uses less digits than its factorization.

1264813345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105.

The product of its digits is 69120, while the sum is 37.

The square root of 1264813345 is about 35564.2143874991. The cubic root of 1264813345 is about 1081.4558968606.

Adding to 1264813345 its reverse (5433184621), we get a palindrome (6697997966).

The spelling of 1264813345 in words is "one billion, two hundred sixty-four million, eight hundred thirteen thousand, three hundred forty-five".