1004312321 has 4 divisors (see below), whose sum is σ = 1006642944. Its totient is φ = 1001981700.

The previous prime is 1004312303. The next prime is 1004312329. The reversal of 1004312321 is 1232134001.

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: 1232134001 = 7 ⋅176019143.

It is a cyclic number.

It is not a de Polignac number, because 1004312321 - 2¹⁴ = 1004295937 is a prime.

It is a super-2 number, since 2×1004312321² = 2017286476224814082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1004312321.

It is not an unprimeable number, because it can be changed into a prime (1004312329) 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, 1164665 + ... + 1165526.

It is an arithmetic number, because the mean of its divisors is an integer number (251660736).

Almost surely, 2^1004312321 is an apocalyptic number.

It is an amenable number.

1004312321 is a deficient number, since it is larger than the sum of its proper divisors (2330623).

1004312321 is an equidigital number, since it uses as much as digits as its factorization.

1004312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330622.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1004312321 is about 31690.8870339724. The cubic root of 1004312321 is about 1001.4353790346.

Adding to 1004312321 its reverse (1232134001), we get a palindrome (2236446322).

The spelling of 1004312321 in words is "one billion, four million, three hundred twelve thousand, three hundred twenty-one".