12312277 has 2 divisors, whose sum is σ = 12312278. Its totient is φ = 12312276.

The previous prime is 12312263. The next prime is 12312281. The reversal of 12312277 is 77221321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11249316 + 1062961 = 3354^2 + 1031^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312277 - 2⁷ = 12312149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12312217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156138 + 6156139.

It is an arithmetic number, because the mean of its divisors is an integer number (6156139).

Almost surely, 2^12312277 is an apocalyptic number.

It is an amenable number.

12312277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312277 is an equidigital number, since it uses as much as digits as its factorization.

12312277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 25.

The square root of 12312277 is about 3508.8854355764. The cubic root of 12312277 is about 230.9117995641.

Adding to 12312277 its reverse (77221321), we get a palindrome (89533598).

The spelling of 12312277 in words is "twelve million, three hundred twelve thousand, two hundred seventy-seven".