1002002042 has 4 divisors (see below), whose sum is σ = 1503003066. Its totient is φ = 501001020.

The previous prime is 1002002041. The next prime is 1002002051. The reversal of 1002002042 is 2402002001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 969637321 + 32364721 = 31139^2 + 5689^2 .

It is not an unprimeable number, because it can be changed into a prime (1002002041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250500509 + ... + 250500512.

Almost surely, 2^1002002042 is an apocalyptic number.

1002002042 is a deficient number, since it is larger than the sum of its proper divisors (501001024).

1002002042 is an equidigital number, since it uses as much as digits as its factorization.

1002002042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501001023.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1002002042 is about 31654.4158372888. The cubic root of 1002002042 is about 1000.6669024756. Note that the first 3 decimals are identical.

Adding to 1002002042 its reverse (2402002001), we get a palindrome (3404004043).

The spelling of 1002002042 in words is "one billion, two million, two thousand, forty-two".