12206555 has 4 divisors (see below), whose sum is σ = 14647872. Its totient is φ = 9765240.

The previous prime is 12206543. The next prime is 12206567. The reversal of 12206555 is 55560221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12206543) and next prime (12206567).

It is a de Polignac number, because none of the positive numbers 2^k-12206555 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 1220651 + ... + 1220660.

It is an arithmetic number, because the mean of its divisors is an integer number (3661968).

Almost surely, 2^12206555 is an apocalyptic number.

12206555 is a deficient number, since it is larger than the sum of its proper divisors (2441317).

12206555 is an equidigital number, since it uses as much as digits as its factorization.

12206555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441316.

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

The square root of 12206555 is about 3493.7880588267. The cubic root of 12206555 is about 230.2489742453.

Adding to 12206555 its reverse (55560221), we get a palindrome (67766776).

The spelling of 12206555 in words is "twelve million, two hundred six thousand, five hundred fifty-five".