1004523021 has 12 divisors (see below), whose sum is σ = 1468460448. Its totient is φ = 661613064.

The previous prime is 1004523019. The next prime is 1004523077. The reversal of 1004523021 is 1203254001.

It is not a de Polignac number, because 1004523021 - 2¹ = 1004523019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1004522985 and 1004523003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004523011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 671625 + ... + 673118.

It is an arithmetic number, because the mean of its divisors is an integer number (122371704).

Almost surely, 2^1004523021 is an apocalyptic number.

It is an amenable number.

1004523021 is a deficient number, since it is larger than the sum of its proper divisors (463937427).

1004523021 is a wasteful number, since it uses less digits than its factorization.

1004523021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344832 (or 1344829 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1004523021 is about 31694.2111591376. The cubic root of 1004523021 is about 1001.5054062814.

Adding to 1004523021 its reverse (1203254001), we get a palindrome (2207777022).

The spelling of 1004523021 in words is "one billion, four million, five hundred twenty-three thousand, twenty-one".