12261611 has 2 divisors, whose sum is σ = 12261612. Its totient is φ = 12261610.

The previous prime is 12261581. The next prime is 12261617. The reversal of 12261611 is 11616221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12261611 - 2⁶ = 12261547 is a prime.

It is not a weakly prime, because it can be changed into another prime (12261617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6130805 + 6130806.

It is an arithmetic number, because the mean of its divisors is an integer number (6130806).

Almost surely, 2^12261611 is an apocalyptic number.

12261611 is a deficient number, since it is larger than the sum of its proper divisors (1).

12261611 is an equidigital number, since it uses as much as digits as its factorization.

12261611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 20.

The square root of 12261611 is about 3501.6583214243. The cubic root of 12261611 is about 230.5946239520.

Adding to 12261611 its reverse (11616221), we get a palindrome (23877832).

The spelling of 12261611 in words is "twelve million, two hundred sixty-one thousand, six hundred eleven".