1021044004 has 24 divisors (see below), whose sum is σ = 1895199768. Its totient is φ = 479662080.

The previous prime is 1021044001. The next prime is 1021044023. The reversal of 1021044004 is 4004401201.

It can be written as a sum of positive squares in 4 ways, for example, as 487526400 + 533517604 = 22080^2 + 23098^2 .

It is not an unprimeable number, because it can be changed into a prime (1021044001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27664 + ... + 52984.

It is an arithmetic number, because the mean of its divisors is an integer number (78966657).

Almost surely, 2^1021044004 is an apocalyptic number.

It is an amenable number.

1021044004 is a deficient number, since it is larger than the sum of its proper divisors (874155764).

1021044004 is a wasteful number, since it uses less digits than its factorization.

1021044004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25935 (or 25933 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1021044004 is about 31953.7791818120. The cubic root of 1021044004 is about 1006.9660297526.

Adding to 1021044004 its reverse (4004401201), we get a palindrome (5025445205).

The spelling of 1021044004 in words is "one billion, twenty-one million, forty-four thousand, four".