1004450621 has 2 divisors, whose sum is σ = 1004450622. Its totient is φ = 1004450620.

The previous prime is 1004450597. The next prime is 1004450653. The reversal of 1004450621 is 1260544001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972753721 + 31696900 = 31189^2 + 5630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004450621 - 2¹⁸ = 1004188477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004450221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502225310 + 502225311.

It is an arithmetic number, because the mean of its divisors is an integer number (502225311).

Almost surely, 2^1004450621 is an apocalyptic number.

It is an amenable number.

1004450621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004450621 is an equidigital number, since it uses as much as digits as its factorization.

1004450621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1004450621 is about 31693.0689741464. The cubic root of 1004450621 is about 1001.4813448672.

Adding to 1004450621 its reverse (1260544001), we get a palindrome (2264994622).

The spelling of 1004450621 in words is "one billion, four million, four hundred fifty thousand, six hundred twenty-one".