12200555 has 4 divisors (see below), whose sum is σ = 14640672. Its totient is φ = 9760440.

The previous prime is 12200537. The next prime is 12200581. The reversal of 12200555 is 55500221.

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

It is not a de Polignac number, because 12200555 - 2¹⁰ = 12199531 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, 1220051 + ... + 1220060.

It is an arithmetic number, because the mean of its divisors is an integer number (3660168).

Almost surely, 2^12200555 is an apocalyptic number.

12200555 is a deficient number, since it is larger than the sum of its proper divisors (2440117).

12200555 is an equidigital number, since it uses as much as digits as its factorization.

12200555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440116.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 12200555 is about 3492.9292864299. The cubic root of 12200555 is about 230.2112425986.

Adding to 12200555 its reverse (55500221), we get a palindrome (67700776).

The spelling of 12200555 in words is "twelve million, two hundred thousand, five hundred fifty-five".