13142321 has 2 divisors, whose sum is σ = 13142322. Its totient is φ = 13142320.

The previous prime is 13142299. The next prime is 13142333. The reversal of 13142321 is 12324131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9394225 + 3748096 = 3065^2 + 1936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13142321 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13142321.

It is not a weakly prime, because it can be changed into another prime (13142351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6571160 + 6571161.

It is an arithmetic number, because the mean of its divisors is an integer number (6571161).

Almost surely, 2^13142321 is an apocalyptic number.

It is an amenable number.

13142321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13142321 is an equidigital number, since it uses as much as digits as its factorization.

13142321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13142321 is about 3625.2339234869. The cubic root of 13142321 is about 235.9884187077.

Adding to 13142321 its reverse (12324131), we get a palindrome (25466452).

The spelling of 13142321 in words is "thirteen million, one hundred forty-two thousand, three hundred twenty-one".