1321310306 has 8 divisors (see below), whose sum is σ = 1990621020. Its totient is φ = 657769968.

The previous prime is 1321310297. The next prime is 1321310311. The reversal of 1321310306 is 6030131231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1157700625 + 163609681 = 34025^2 + 12791^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442021 + ... + 1442936.

Almost surely, 2^1321310306 is an apocalyptic number.

1321310306 is a deficient number, since it is larger than the sum of its proper divisors (669310714).

1321310306 is a wasteful number, since it uses less digits than its factorization.

1321310306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885188.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1321310306 is about 36349.8322692141. The cubic root of 1321310306 is about 1097.3241588828.

Adding to 1321310306 its reverse (6030131231), we get a palindrome (7351441537).

The spelling of 1321310306 in words is "one billion, three hundred twenty-one million, three hundred ten thousand, three hundred six".