1064431321 has 4 divisors (see below), whose sum is σ = 1067898832. Its totient is φ = 1060963812.

The previous prime is 1064431301. The next prime is 1064431337. The reversal of 1064431321 is 1231344601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1231344601 = 53 ⋅23232917.

It is a cyclic number.

It is not a de Polignac number, because 1064431321 - 2¹⁵ = 1064398553 is a prime.

It is a super-2 number, since 2×1064431321² = 2266028074251610082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1064431301) 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, 1733295 + ... + 1733908.

It is an arithmetic number, because the mean of its divisors is an integer number (266974708).

Almost surely, 2^1064431321 is an apocalyptic number.

It is an amenable number.

1064431321 is a deficient number, since it is larger than the sum of its proper divisors (3467511).

1064431321 is an equidigital number, since it uses as much as digits as its factorization.

1064431321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3467510.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1064431321 is about 32625.6236875251. The cubic root of 1064431321 is about 1021.0316746709.

Adding to 1064431321 its reverse (1231344601), we get a palindrome (2295775922).

The spelling of 1064431321 in words is "one billion, sixty-four million, four hundred thirty-one thousand, three hundred twenty-one".