12720107 has 2 divisors, whose sum is σ = 12720108. Its totient is φ = 12720106.

The previous prime is 12720091. The next prime is 12720133. The reversal of 12720107 is 70102721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12720107 - 2⁴ = 12720091 is a prime.

It is a super-2 number, since 2×12720107² = 323602244182898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12720157) 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, 6360053 + 6360054.

It is an arithmetic number, because the mean of its divisors is an integer number (6360054).

Almost surely, 2^12720107 is an apocalyptic number.

12720107 is a deficient number, since it is larger than the sum of its proper divisors (1).

12720107 is an equidigital number, since it uses as much as digits as its factorization.

12720107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 12720107 is about 3566.5259006490. The cubic root of 12720107 is about 233.4337184839.

Adding to 12720107 its reverse (70102721), we get a palindrome (82822828).

The spelling of 12720107 in words is "twelve million, seven hundred twenty thousand, one hundred seven".