1320330421 has 8 divisors (see below), whose sum is σ = 1374708888. Its totient is φ = 1267008000.

The previous prime is 1320330367. The next prime is 1320330457. The reversal of 1320330421 is 1240330231.

It can be written as a sum of positive squares in 4 ways, for example, as 61074225 + 1259256196 = 7815^2 + 35486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320330421 - 2⁹ = 1320329909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320330521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261460 + ... + 266461.

It is an arithmetic number, because the mean of its divisors is an integer number (171838611).

Almost surely, 2^1320330421 is an apocalyptic number.

It is an amenable number.

1320330421 is a deficient number, since it is larger than the sum of its proper divisors (54378467).

1320330421 is an equidigital number, since it uses as much as digits as its factorization.

1320330421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528023.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1320330421 is about 36336.3512339916. The cubic root of 1320330421 is about 1097.0528329143.

Adding to 1320330421 its reverse (1240330231), we get a palindrome (2560660652).

The spelling of 1320330421 in words is "one billion, three hundred twenty million, three hundred thirty thousand, four hundred twenty-one".