1004221291 has 2 divisors, whose sum is σ = 1004221292. Its totient is φ = 1004221290.

The previous prime is 1004221289. The next prime is 1004221301. The reversal of 1004221291 is 1921224001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1004221291 - 2¹ = 1004221289 is a prime.

Together with 1004221289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1004221201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502110645 + 502110646.

It is an arithmetic number, because the mean of its divisors is an integer number (502110646).

Almost surely, 2^1004221291 is an apocalyptic number.

1004221291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004221291 is an equidigital number, since it uses as much as digits as its factorization.

1004221291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1004221291 is about 31689.4507841332. The cubic root of 1004221291 is about 1001.4051217082.

Adding to 1004221291 its reverse (1921224001), we get a palindrome (2925445292).

The spelling of 1004221291 in words is "one billion, four million, two hundred twenty-one thousand, two hundred ninety-one".