1321342205 has 8 divisors (see below), whose sum is σ = 1615528152. Its totient is φ = 1037128768.

The previous prime is 1321342193. The next prime is 1321342207. The reversal of 1321342205 is 5022431231.

It can be written as a sum of positive squares in 4 ways, for example, as 662444644 + 658897561 = 25738^2 + 25669^2 .

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 1321342205 - 2¹⁴ = 1321325821 is a prime.

It is a super-3 number, since 3×1321342205³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321342207) 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, 2492834 + ... + 2493363.

It is an arithmetic number, because the mean of its divisors is an integer number (201941019).

Almost surely, 2^1321342205 is an apocalyptic number.

It is an amenable number.

1321342205 is a deficient number, since it is larger than the sum of its proper divisors (294185947).

1321342205 is an equidigital number, since it uses as much as digits as its factorization.

1321342205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986255.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1321342205 is about 36350.2710443815. The cubic root of 1321342205 is about 1097.3329893247.

Adding to 1321342205 its reverse (5022431231), we get a palindrome (6343773436).

The spelling of 1321342205 in words is "one billion, three hundred twenty-one million, three hundred forty-two thousand, two hundred five".