1264326673 has 4 divisors (see below), whose sum is σ = 1264677940. Its totient is φ = 1263975408.

The previous prime is 1264326653. The next prime is 1264326683. The reversal of 1264326673 is 3766234621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20142144 + 1244184529 = 4488^2 + 35273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264326673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264326653) 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, 170178 + ... + 177451.

It is an arithmetic number, because the mean of its divisors is an integer number (316169485).

Almost surely, 2^1264326673 is an apocalyptic number.

It is an amenable number.

1264326673 is a deficient number, since it is larger than the sum of its proper divisors (351267).

1264326673 is an equidigital number, since it uses as much as digits as its factorization.

1264326673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351266.

The product of its digits is 217728, while the sum is 40.

The square root of 1264326673 is about 35557.3715704634. The cubic root of 1264326673 is about 1081.3171723535.

The spelling of 1264326673 in words is "one billion, two hundred sixty-four million, three hundred twenty-six thousand, six hundred seventy-three".