1021140404 has 6 divisors (see below), whose sum is σ = 1786995714. Its totient is φ = 510570200.

The previous prime is 1021140331. The next prime is 1021140443. The reversal of 1021140404 is 4040411201.

It can be written as a sum of positive squares in only one way, i.e., 704371600 + 316768804 = 26540^2 + 17798^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 127642547 + ... + 127642554.

It is an arithmetic number, because the mean of its divisors is an integer number (297832619).

Almost surely, 2^1021140404 is an apocalyptic number.

It is an amenable number.

1021140404 is a deficient number, since it is larger than the sum of its proper divisors (765855310).

1021140404 is a wasteful number, since it uses less digits than its factorization.

1021140404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255285105 (or 255285103 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1021140404 is about 31955.2875749851. The cubic root of 1021140404 is about 1006.9977190400.

Adding to 1021140404 its reverse (4040411201), we get a palindrome (5061551605).

The spelling of 1021140404 in words is "one billion, twenty-one million, one hundred forty thousand, four hundred four".