1323410321 has 4 divisors (see below), whose sum is σ = 1323516912. Its totient is φ = 1323303732.

The previous prime is 1323410303. The next prime is 1323410323. The reversal of 1323410321 is 1230143231.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1230143231 = 71 ⋅17325961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323410321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323410293 and 1323410302.

It is not an unprimeable number, because it can be changed into a prime (1323410323) 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, 31775 + ... + 60468.

It is an arithmetic number, because the mean of its divisors is an integer number (330879228).

Almost surely, 2^1323410321 is an apocalyptic number.

It is an amenable number.

1323410321 is a deficient number, since it is larger than the sum of its proper divisors (106591).

1323410321 is an equidigital number, since it uses as much as digits as its factorization.

1323410321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106590.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1323410321 is about 36378.7069726234. The cubic root of 1323410321 is about 1097.9051925820.

Adding to 1323410321 its reverse (1230143231), we get a palindrome (2553553552).

The spelling of 1323410321 in words is "one billion, three hundred twenty-three million, four hundred ten thousand, three hundred twenty-one".