10422421 has 2 divisors, whose sum is σ = 10422422. Its totient is φ = 10422420.

The previous prime is 10422413. The next prime is 10422437. The reversal of 10422421 is 12422401.

It is an a-pointer prime, because the next prime (10422437) can be obtained adding 10422421 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9394225 + 1028196 = 3065^2 + 1014^2 .

It is an emirp because it is prime and its reverse (12422401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10422421 - 2³ = 10422413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10422395 and 10422404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10422481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5211210 + 5211211.

It is an arithmetic number, because the mean of its divisors is an integer number (5211211).

Almost surely, 2^10422421 is an apocalyptic number.

It is an amenable number.

10422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10422421 is an equidigital number, since it uses as much as digits as its factorization.

10422421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 10422421 is about 3228.3774562464. The cubic root of 10422421 is about 218.4353237667.

Adding to 10422421 its reverse (12422401), we get a palindrome (22844822).

The spelling of 10422421 in words is "ten million, four hundred twenty-two thousand, four hundred twenty-one".