1002021042 has 32 divisors (see below), whose sum is σ = 2199343104. Its totient is φ = 301821200.

The previous prime is 1002021037. The next prime is 1002021043. The reversal of 1002021042 is 2401202001.

It is a super-2 number, since 2×1002021042² = 2008092337221531528, which contains 22 as substring.

1002021042 is a modest number, since divided by 21042 gives 1002 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1002021043) 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, 34434 + ... + 56477.

It is an arithmetic number, because the mean of its divisors is an integer number (68729472).

Almost surely, 2^1002021042 is an apocalyptic number.

1002021042 is an abundant number, since it is smaller than the sum of its proper divisors (1197322062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002021042 is a wasteful number, since it uses less digits than its factorization.

1002021042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91094.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1002021042 is about 31654.7159519715. The cubic root of 1002021042 is about 1000.6732273299.

Adding to 1002021042 its reverse (2401202001), we get a palindrome (3403223043).

The spelling of 1002021042 in words is "one billion, two million, twenty-one thousand, forty-two".