1200203243 has 8 divisors (see below), whose sum is σ = 1226940816. Its totient is φ = 1173693600.

The previous prime is 1200203239. The next prime is 1200203297. The reversal of 1200203243 is 3423020021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200203243 - 2² = 1200203239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200203443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46313 + ... + 67418.

It is an arithmetic number, because the mean of its divisors is an integer number (153367602).

Almost surely, 2^1200203243 is an apocalyptic number.

1200203243 is a deficient number, since it is larger than the sum of its proper divisors (26737573).

1200203243 is a wasteful number, since it uses less digits than its factorization.

1200203243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113965.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1200203243 is about 34643.9495871934. The cubic root of 1200203243 is about 1062.7185596613.

Adding to 1200203243 its reverse (3423020021), we get a palindrome (4623223264).

The spelling of 1200203243 in words is "one billion, two hundred million, two hundred three thousand, two hundred forty-three".