1004133421 has 4 divisors (see below), whose sum is σ = 1005936732. Its totient is φ = 1002330112.

The previous prime is 1004133409. The next prime is 1004133437. The reversal of 1004133421 is 1243314001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243314001 = 19 ⋅65437579.

It can be written as a sum of positive squares in 2 ways, for example, as 150675625 + 853457796 = 12275^2 + 29214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004133421 - 2⁷ = 1004133293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004133401) 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, 900820 + ... + 901933.

It is an arithmetic number, because the mean of its divisors is an integer number (251484183).

Almost surely, 2^1004133421 is an apocalyptic number.

It is an amenable number.

1004133421 is a deficient number, since it is larger than the sum of its proper divisors (1803311).

1004133421 is an equidigital number, since it uses as much as digits as its factorization.

1004133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803310.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1004133421 is about 31688.0643302806. The cubic root of 1004133421 is about 1001.3759129952.

Adding to 1004133421 its reverse (1243314001), we get a palindrome (2247447422).

The spelling of 1004133421 in words is "one billion, four million, one hundred thirty-three thousand, four hundred twenty-one".