1002323021 has 4 divisors (see below), whose sum is σ = 1145512032. Its totient is φ = 859134012.

The previous prime is 1002322963. The next prime is 1002323041. The reversal of 1002323021 is 1203232001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1002323021 - 2¹⁰ = 1002321997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1002322987 and 1002323005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002323041) 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 in 3 ways as a sum of consecutive naturals, for example, 71594495 + ... + 71594508.

It is an arithmetic number, because the mean of its divisors is an integer number (286378008).

Almost surely, 2^1002323021 is an apocalyptic number.

It is an amenable number.

1002323021 is a deficient number, since it is larger than the sum of its proper divisors (143189011).

1002323021 is an equidigital number, since it uses as much as digits as its factorization.

1002323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143189010.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1002323021 is about 31659.4854822374. The cubic root of 1002323021 is about 1000.7737415030.

Adding to 1002323021 its reverse (1203232001), we get a palindrome (2205555022).

The spelling of 1002323021 in words is "one billion, two million, three hundred twenty-three thousand, twenty-one".