1302401321 has 4 divisors (see below), whose sum is σ = 1402586052. Its totient is φ = 1202216592.

The previous prime is 1302401299. The next prime is 1302401333. The reversal of 1302401321 is 1231042031.

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 793267225 + 509134096 = 28165^2 + 22564^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302401321 - 2¹⁸ = 1302139177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1302401321.

It is not an unprimeable number, because it can be changed into a prime (1302401371) 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, 50092346 + ... + 50092371.

It is an arithmetic number, because the mean of its divisors is an integer number (350646513).

Almost surely, 2^1302401321 is an apocalyptic number.

It is an amenable number.

1302401321 is a deficient number, since it is larger than the sum of its proper divisors (100184731).

1302401321 is a wasteful number, since it uses less digits than its factorization.

1302401321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100184730.

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

The square root of 1302401321 is about 36088.7977217308. The cubic root of 1302401321 is about 1092.0644657855.

Adding to 1302401321 its reverse (1231042031), we get a palindrome (2533443352).

The spelling of 1302401321 in words is "one billion, three hundred two million, four hundred one thousand, three hundred twenty-one".