12201243 has 4 divisors (see below), whose sum is σ = 16268328. Its totient is φ = 8134160.

The previous prime is 12201229. The next prime is 12201251. The reversal of 12201243 is 34210221.

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

It is a cyclic number.

It is not a de Polignac number, because 12201243 - 2¹⁷ = 12070171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12201263) by changing a digit.

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, 2033538 + ... + 2033543.

It is an arithmetic number, because the mean of its divisors is an integer number (4067082).

Almost surely, 2^12201243 is an apocalyptic number.

12201243 is a deficient number, since it is larger than the sum of its proper divisors (4067085).

12201243 is an equidigital number, since it uses as much as digits as its factorization.

12201243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067084.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12201243 is about 3493.0277697150. The cubic root of 12201243 is about 230.2155697886.

Adding to 12201243 its reverse (34210221), we get a palindrome (46411464).

It can be divided in two parts, 12 and 201243, that multiplied together give a square (2414916 = 1554²).

The spelling of 12201243 in words is "twelve million, two hundred one thousand, two hundred forty-three".