12420277 has 2 divisors, whose sum is σ = 12420278. Its totient is φ = 12420276.

The previous prime is 12420269. The next prime is 12420311. The reversal of 12420277 is 77202421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 1602756 = 3289^2 + 1266^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420277 - 2³ = 12420269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12420227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210138 + 6210139.

It is an arithmetic number, because the mean of its divisors is an integer number (6210139).

Almost surely, 2^12420277 is an apocalyptic number.

It is an amenable number.

12420277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420277 is an equidigital number, since it uses as much as digits as its factorization.

12420277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 12420277 is about 3524.2413367986. The cubic root of 12420277 is about 231.5850005151.

Adding to 12420277 its reverse (77202421), we get a palindrome (89622698).

The spelling of 12420277 in words is "twelve million, four hundred twenty thousand, two hundred seventy-seven".