1004164021 has 8 divisors (see below), whose sum is σ = 1152083520. Its totient is φ = 857361408.

The previous prime is 1004164019. The next prime is 1004164093. The reversal of 1004164021 is 1204614001.

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

It is a cyclic number.

It is not a de Polignac number, because 1004164021 - 2¹ = 1004164019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1004164021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004164001) 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, 277291 + ... + 280888.

It is an arithmetic number, because the mean of its divisors is an integer number (144010440).

Almost surely, 2^1004164021 is an apocalyptic number.

It is an amenable number.

1004164021 is a deficient number, since it is larger than the sum of its proper divisors (147919499).

1004164021 is an equidigital number, since it uses as much as digits as its factorization.

1004164021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558443.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1004164021 is about 31688.5471582400. The cubic root of 1004164021 is about 1001.3860848810.

Adding to 1004164021 its reverse (1204614001), we get a palindrome (2208778022).

It can be divided in two parts, 1004 and 164021, that added together give a triangular number (165025 = T₅₇₄).

The spelling of 1004164021 in words is "one billion, four million, one hundred sixty-four thousand, twenty-one".