1002021442 has 4 divisors (see below), whose sum is σ = 1503032166. Its totient is φ = 501010720.

The previous prime is 1002021439. The next prime is 1002021443. The reversal of 1002021442 is 2441202001.

1002021442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 887980401 + 114041041 = 29799^2 + 10679^2 .

It is not an unprimeable number, because it can be changed into a prime (1002021443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250505359 + ... + 250505362.

Almost surely, 2^1002021442 is an apocalyptic number.

1002021442 is a deficient number, since it is larger than the sum of its proper divisors (501010724).

1002021442 is an equidigital number, since it uses as much as digits as its factorization.

1002021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501010723.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1002021442 is about 31654.7222701448. The cubic root of 1002021442 is about 1000.6733604839.

Adding to 1002021442 its reverse (2441202001), we get a palindrome (3443223443).

The spelling of 1002021442 in words is "one billion, two million, twenty-one thousand, four hundred forty-two".