12256505 has 16 divisors (see below), whose sum is σ = 15216960. Its totient is φ = 9471168.

The previous prime is 12256487. The next prime is 12256549. The reversal of 12256505 is 50565221.

It is a cyclic number.

It is not a de Polignac number, because 12256505 - 2¹⁴ = 12240121 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23174 + ... + 23696.

It is an arithmetic number, because the mean of its divisors is an integer number (951060).

Almost surely, 2^12256505 is an apocalyptic number.

It is an amenable number.

12256505 is a deficient number, since it is larger than the sum of its proper divisors (2960455).

12256505 is a wasteful number, since it uses less digits than its factorization.

12256505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 12256505 is about 3500.9291623796. The cubic root of 12256505 is about 230.5626113118.

The spelling of 12256505 in words is "twelve million, two hundred fifty-six thousand, five hundred five".