12105271 has 2 divisors, whose sum is σ = 12105272. Its totient is φ = 12105270.

The previous prime is 12105211. The next prime is 12105293. The reversal of 12105271 is 17250121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12105271 - 2⁷ = 12105143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12105211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6052635 + 6052636.

It is an arithmetic number, because the mean of its divisors is an integer number (6052636).

Almost surely, 2^12105271 is an apocalyptic number.

12105271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12105271 is an equidigital number, since it uses as much as digits as its factorization.

12105271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 12105271 is about 3479.2629966704. The cubic root of 12105271 is about 229.6103737315.

Adding to 12105271 its reverse (17250121), we get a palindrome (29355392).

The spelling of 12105271 in words is "twelve million, one hundred five thousand, two hundred seventy-one".