1002001143 has 16 divisors (see below), whose sum is σ = 1569568896. Its totient is φ = 560559840.

The previous prime is 1002001123. The next prime is 1002001159. The reversal of 1002001143 is 3411002001.

It is a happy number.

It is not a de Polignac number, because 1002001143 - 2⁸ = 1002000887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002001123) 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, 1167405 + ... + 1168262.

It is an arithmetic number, because the mean of its divisors is an integer number (98098056).

Almost surely, 2^1002001143 is an apocalyptic number.

1002001143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1002001143 is a deficient number, since it is larger than the sum of its proper divisors (567567753).

1002001143 is a wasteful number, since it uses less digits than its factorization.

1002001143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335694.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1002001143 is about 31654.4016370552. The cubic root of 1002001143 is about 1000.6666032081. Note that the first 4 decimals are identical.

Adding to 1002001143 its reverse (3411002001), we get a palindrome (4413003144).

The spelling of 1002001143 in words is "one billion, two million, one thousand, one hundred forty-three".