12020555 has 4 divisors (see below), whose sum is σ = 14424672. Its totient is φ = 9616440.

The previous prime is 12020551. The next prime is 12020557. The reversal of 12020555 is 55502021.

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

It is not a de Polignac number, because 12020555 - 2² = 12020551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202051 + ... + 1202060.

It is an arithmetic number, because the mean of its divisors is an integer number (3606168).

Almost surely, 2^12020555 is an apocalyptic number.

12020555 is a deficient number, since it is larger than the sum of its proper divisors (2404117).

12020555 is an equidigital number, since it uses as much as digits as its factorization.

12020555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404116.

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

The square root of 12020555 is about 3467.0672044251. The cubic root of 12020555 is about 229.0734939511.

Adding to 12020555 its reverse (55502021), we get a palindrome (67522576).

The spelling of 12020555 in words is "twelve million, twenty thousand, five hundred fifty-five".