12255511 has 2 divisors, whose sum is σ = 12255512. Its totient is φ = 12255510.

The previous prime is 12255499. The next prime is 12255517. The reversal of 12255511 is 11555221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12255511 - 2⁵ = 12255479 is a prime.

It is a super-2 number, since 2×12255511² = 300395099742242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12255517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6127755 + 6127756.

It is an arithmetic number, because the mean of its divisors is an integer number (6127756).

Almost surely, 2^12255511 is an apocalyptic number.

12255511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12255511 is an equidigital number, since it uses as much as digits as its factorization.

12255511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500, while the sum is 22.

The square root of 12255511 is about 3500.7871971887. The cubic root of 12255511 is about 230.5563782834.

It can be divided in two parts, 1225 and 5511, that multiplied together give a triangular number (6750975 = T₃₆₇₄).

The spelling of 12255511 in words is "twelve million, two hundred fifty-five thousand, five hundred eleven".