1304102721 has 8 divisors (see below), whose sum is σ = 1739111680. Its totient is φ = 869247792.

The previous prime is 1304102719. The next prime is 1304102731. The reversal of 1304102721 is 1272014031.

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

It is not a de Polignac number, because 1304102721 - 2¹ = 1304102719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304102731) 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, 17041 + ... + 53838.

It is an arithmetic number, because the mean of its divisors is an integer number (217388960).

Almost surely, 2^1304102721 is an apocalyptic number.

It is an amenable number.

1304102721 is a deficient number, since it is larger than the sum of its proper divisors (435008959).

1304102721 is an equidigital number, since it uses as much as digits as its factorization.

1304102721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77015.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1304102721 is about 36112.3624400288. The cubic root of 1304102721 is about 1092.5398005772.

Adding to 1304102721 its reverse (1272014031), we get a palindrome (2576116752).

The spelling of 1304102721 in words is "one billion, three hundred four million, one hundred two thousand, seven hundred twenty-one".