13342421 has 2 divisors, whose sum is σ = 13342422. Its totient is φ = 13342420.

The previous prime is 13342397. The next prime is 13342423. The reversal of 13342421 is 12424331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 483025 = 3586^2 + 695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13342421 is a prime.

Together with 13342423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13342393 and 13342402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13342423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6671210 + 6671211.

It is an arithmetic number, because the mean of its divisors is an integer number (6671211).

Almost surely, 2^13342421 is an apocalyptic number.

It is an amenable number.

13342421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13342421 is an equidigital number, since it uses as much as digits as its factorization.

13342421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 13342421 is about 3652.7278847459. The cubic root of 13342421 is about 237.1800811657.

Adding to 13342421 its reverse (12424331), we get a palindrome (25766752).

The spelling of 13342421 in words is "thirteen million, three hundred forty-two thousand, four hundred twenty-one".