12105261 has 32 divisors (see below), whose sum is σ = 21580800. Its totient is φ = 6551280.

The previous prime is 12105211. The next prime is 12105271. The reversal of 12105261 is 16250121.

It is not a de Polignac number, because 12105261 - 2⁷ = 12105133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105211) 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 in 31 ways as a sum of consecutive naturals, for example, 1906 + ... + 5276.

It is an arithmetic number, because the mean of its divisors is an integer number (674400).

Almost surely, 2^12105261 is an apocalyptic number.

It is an amenable number.

12105261 is a deficient number, since it is larger than the sum of its proper divisors (9475539).

12105261 is a wasteful number, since it uses less digits than its factorization.

12105261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12105261 is about 3479.2615595842. The cubic root of 12105261 is about 229.6103105055.

Adding to 12105261 its reverse (16250121), we get a palindrome (28355382).

The spelling of 12105261 in words is "twelve million, one hundred five thousand, two hundred sixty-one".