12420571 has 2 divisors, whose sum is σ = 12420572. Its totient is φ = 12420570.

The previous prime is 12420521. The next prime is 12420589. The reversal of 12420571 is 17502421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12420571 - 2⁹ = 12420059 is a prime.

It is not a weakly prime, because it can be changed into another prime (12420511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210285 + 6210286.

It is an arithmetic number, because the mean of its divisors is an integer number (6210286).

Almost surely, 2^12420571 is an apocalyptic number.

12420571 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420571 is an equidigital number, since it uses as much as digits as its factorization.

12420571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 12420571 is about 3524.2830476566. The cubic root of 12420571 is about 231.5868277812.

Adding to 12420571 its reverse (17502421), we get a palindrome (29922992).

The spelling of 12420571 in words is "twelve million, four hundred twenty thousand, five hundred seventy-one".