1302140321 has 4 divisors (see below), whose sum is σ = 1302815892. Its totient is φ = 1301464752.

The previous prime is 1302140293. The next prime is 1302140351. The reversal of 1302140321 is 1230412031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 535459600 + 766680721 = 23140^2 + 27689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302140321 - 2³⁰ = 228398497 is a prime.

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 1302140321.

It is not an unprimeable number, because it can be changed into a prime (1302140351) 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, 334886 + ... + 338751.

It is an arithmetic number, because the mean of its divisors is an integer number (325703973).

Almost surely, 2^1302140321 is an apocalyptic number.

It is an amenable number.

1302140321 is a deficient number, since it is larger than the sum of its proper divisors (675571).

1302140321 is an equidigital number, since it uses as much as digits as its factorization.

1302140321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675570.

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

The square root of 1302140321 is about 36085.1814599844. The cubic root of 1302140321 is about 1091.9915113479.

Adding to 1302140321 its reverse (1230412031), we get a palindrome (2532552352).

The spelling of 1302140321 in words is "one billion, three hundred two million, one hundred forty thousand, three hundred twenty-one".