1200243143 has 16 divisors (see below), whose sum is σ = 1360219392. Its totient is φ = 1049496000.

The previous prime is 1200243131. The next prime is 1200243169. The reversal of 1200243143 is 3413420021.

It is a cyclic number.

It is not a de Polignac number, because 1200243143 - 2¹⁴ = 1200226759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200243103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13280 + ... + 50762.

It is an arithmetic number, because the mean of its divisors is an integer number (85013712).

Almost surely, 2^1200243143 is an apocalyptic number.

1200243143 is a deficient number, since it is larger than the sum of its proper divisors (159976249).

1200243143 is a wasteful number, since it uses less digits than its factorization.

1200243143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37606.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1200243143 is about 34644.5254405368. The cubic root of 1200243143 is about 1062.7303360003.

Adding to 1200243143 its reverse (3413420021), we get a palindrome (4613663164).

The spelling of 1200243143 in words is "one billion, two hundred million, two hundred forty-three thousand, one hundred forty-three".