1202001143 has 4 divisors (see below), whose sum is σ = 1373715600. Its totient is φ = 1030286688.

The previous prime is 1202001139. The next prime is 1202001173. The reversal of 1202001143 is 3411002021.

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 1202001143 - 2² = 1202001139 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 (1202001173) 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 3 ways as a sum of consecutive naturals, for example, 85857218 + ... + 85857231.

It is an arithmetic number, because the mean of its divisors is an integer number (343428900).

Almost surely, 2^1202001143 is an apocalyptic number.

1202001143 is a deficient number, since it is larger than the sum of its proper divisors (171714457).

1202001143 is an equidigital number, since it uses as much as digits as its factorization.

1202001143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171714456.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1202001143 is about 34669.8881307685. Note that the first 3 decimals coincide. The cubic root of 1202001143 is about 1063.2489443963.

Adding to 1202001143 its reverse (3411002021), we get a palindrome (4613003164).

The spelling of 1202001143 in words is "one billion, two hundred two million, one thousand, one hundred forty-three".