1264411321 has 4 divisors (see below), whose sum is σ = 1268727012. Its totient is φ = 1260095632.

The previous prime is 1264411307. The next prime is 1264411327. The reversal of 1264411321 is 1231144621.

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 1029126400 + 235284921 = 32080^2 + 15339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264411321 - 2²⁹ = 727540409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264411327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2157406 + ... + 2157991.

It is an arithmetic number, because the mean of its divisors is an integer number (317181753).

Almost surely, 2^1264411321 is an apocalyptic number.

It is an amenable number.

1264411321 is a deficient number, since it is larger than the sum of its proper divisors (4315691).

1264411321 is an equidigital number, since it uses as much as digits as its factorization.

1264411321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315690.

The product of its digits is 1152, while the sum is 25.

The square root of 1264411321 is about 35558.5618522459. The cubic root of 1264411321 is about 1081.3413035888.

Adding to 1264411321 its reverse (1231144621), we get a palindrome (2495555942).

The spelling of 1264411321 in words is "one billion, two hundred sixty-four million, four hundred eleven thousand, three hundred twenty-one".