1200243133 has 4 divisors (see below), whose sum is σ = 1228155808. Its totient is φ = 1172330460.

The previous prime is 1200243131. The next prime is 1200243169. The reversal of 1200243133 is 3313420021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200243133 - 2¹ = 1200243131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200243133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200243131) 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, 13956273 + ... + 13956358.

It is an arithmetic number, because the mean of its divisors is an integer number (307038952).

Almost surely, 2^1200243133 is an apocalyptic number.

It is an amenable number.

1200243133 is a deficient number, since it is larger than the sum of its proper divisors (27912675).

1200243133 is an equidigital number, since it uses as much as digits as its factorization.

1200243133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27912674.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1200243133 is about 34644.5252962138. The cubic root of 1200243133 is about 1062.7303330489.

Adding to 1200243133 its reverse (3313420021), we get a palindrome (4513663154).

The spelling of 1200243133 in words is "one billion, two hundred million, two hundred forty-three thousand, one hundred thirty-three".