13422247 has 2 divisors, whose sum is σ = 13422248. Its totient is φ = 13422246.

The previous prime is 13422229. The next prime is 13422251. The reversal of 13422247 is 74222431.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13422247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13426247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6711123 + 6711124.

It is an arithmetic number, because the mean of its divisors is an integer number (6711124).

Almost surely, 2^13422247 is an apocalyptic number.

13422247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13422247 is an equidigital number, since it uses as much as digits as its factorization.

13422247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 25.

The square root of 13422247 is about 3663.6384919913. The cubic root of 13422247 is about 237.6521470169.

Adding to 13422247 its reverse (74222431), we get a palindrome (87644678).

The spelling of 13422247 in words is "thirteen million, four hundred twenty-two thousand, two hundred forty-seven".