1004253203521 has 8 divisors (see below), whose sum is σ = 1020829983264. Its totient is φ = 987783027360.

The previous prime is 1004253203491. The next prime is 1004253203537. The reversal of 1004253203521 is 1253023524001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1004253203521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1004253203521.

It is not an unprimeable number, because it can be changed into a prime (1004253200521) 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 7 ways as a sum of consecutive naturals, for example, 26631900 + ... + 26669581.

It is an arithmetic number, because the mean of its divisors is an integer number (127603747908).

Almost surely, 2^{1004253203521} is an apocalyptic number.

It is an amenable number.

1004253203521 is a deficient number, since it is larger than the sum of its proper divisors (16576779743).

1004253203521 is an equidigital number, since it uses as much as digits as its factorization.

1004253203521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53301791.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 1004253203521 its reverse (1253023524001), we get a palindrome (2257276727522).

The spelling of 1004253203521 in words is "one trillion, four billion, two hundred fifty-three million, two hundred three thousand, five hundred twenty-one".