1021404424 has 16 divisors (see below), whose sum is σ = 1998400320. Its totient is φ = 488497680.

The previous prime is 1021404409. The next prime is 1021404427. The reversal of 1021404424 is 4244041201.

It is a junction number, because it is equal to n+sod(n) for n = 1021404395 and 1021404404.

It is not an unprimeable number, because it can be changed into a prime (1021404427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2775372 + ... + 2775739.

It is an arithmetic number, because the mean of its divisors is an integer number (124900020).

Almost surely, 2^1021404424 is an apocalyptic number.

It is an amenable number.

1021404424 is a deficient number, since it is larger than the sum of its proper divisors (976995896).

1021404424 is a wasteful number, since it uses less digits than its factorization.

1021404424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5551140 (or 5551136 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1021404424 is about 31959.4183927055. The cubic root of 1021404424 is about 1007.0844993450.

Adding to 1021404424 its reverse (4244041201), we get a palindrome (5265445625).

The spelling of 1021404424 in words is "one billion, twenty-one million, four hundred four thousand, four hundred twenty-four".