12420769 has 2 divisors, whose sum is σ = 12420770. Its totient is φ = 12420768.

The previous prime is 12420767. The next prime is 12420773. The reversal of 12420769 is 96702421.

12420769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9486400 + 2934369 = 3080^2 + 1713^2 .

It is an emirp because it is prime and its reverse (96702421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12420769 - 2¹ = 12420767 is a prime.

It is a super-2 number, since 2×12420769² = 308551005102722, which contains 22 as substring.

Together with 12420767, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12420769.

It is not a weakly prime, because it can be changed into another prime (12420767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210384 + 6210385.

It is an arithmetic number, because the mean of its divisors is an integer number (6210385).

Almost surely, 2^12420769 is an apocalyptic number.

It is an amenable number.

12420769 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420769 is an equidigital number, since it uses as much as digits as its factorization.

12420769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 12420769 is about 3524.3111383645. The cubic root of 12420769 is about 231.5880583727.

The spelling of 12420769 in words is "twelve million, four hundred twenty thousand, seven hundred sixty-nine".