12661027 has 2 divisors, whose sum is σ = 12661028. Its totient is φ = 12661026.

The previous prime is 12661021. The next prime is 12661031. The reversal of 12661027 is 72016621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12661027 - 2¹⁹ = 12136739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12660992 and 12661010.

It is not a weakly prime, because it can be changed into another prime (12661021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330513 + 6330514.

It is an arithmetic number, because the mean of its divisors is an integer number (6330514).

Almost surely, 2^12661027 is an apocalyptic number.

12661027 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661027 is an equidigital number, since it uses as much as digits as its factorization.

12661027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12661027 is about 3558.2336910327. The cubic root of 12661027 is about 233.0717542578.

Adding to 12661027 its reverse (72016621), we get a palindrome (84677648).

The spelling of 12661027 in words is "twelve million, six hundred sixty-one thousand, twenty-seven".