1002021252 has 24 divisors (see below), whose sum is σ = 2362155936. Its totient is φ = 330563328.

The previous prime is 1002021239. The next prime is 1002021281. The reversal of 1002021252 is 2521202001.

1002021252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429258 + ... + 431585.

It is an arithmetic number, because the mean of its divisors is an integer number (98423164).

Almost surely, 2^1002021252 is an apocalyptic number.

1002021252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1002021252 is an abundant number, since it is smaller than the sum of its proper divisors (1360134684).

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

1002021252 is a wasteful number, since it uses less digits than its factorization.

1002021252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860947 (or 860945 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1002021252 is about 31654.7192690126. The cubic root of 1002021252 is about 1000.6732972358.

Adding to 1002021252 its reverse (2521202001), we get a palindrome (3523223253).

The spelling of 1002021252 in words is "one billion, two million, twenty-one thousand, two hundred fifty-two".