1004344021 has 16 divisors (see below), whose sum is σ = 1043006976. Its totient is φ = 966361536.

The previous prime is 1004343997. The next prime is 1004344027. The reversal of 1004344021 is 1204434001.

It is a cyclic number.

It is not a de Polignac number, because 1004344021 - 2²⁷ = 870126293 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 1004344021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004344027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1654300 + ... + 1654906.

It is an arithmetic number, because the mean of its divisors is an integer number (65187936).

Almost surely, 2^1004344021 is an apocalyptic number.

It is an amenable number.

1004344021 is a deficient number, since it is larger than the sum of its proper divisors (38662955).

1004344021 is a wasteful number, since it uses less digits than its factorization.

1004344021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1004344021 is about 31691.3871738048. The cubic root of 1004344021 is about 1001.4459153212.

Adding to 1004344021 its reverse (1204434001), we get a palindrome (2208778022).

The spelling of 1004344021 in words is "one billion, four million, three hundred forty-four thousand, twenty-one".