1021243204 has 12 divisors (see below), whose sum is σ = 1787458428. Its totient is φ = 510540800.

The previous prime is 1021243187. The next prime is 1021243241. The reversal of 1021243204 is 4023421201.

It can be written as a sum of positive squares in 2 ways, for example, as 582256900 + 438986304 = 24130^2 + 20952^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 15084 + ... + 47644.

It is an arithmetic number, because the mean of its divisors is an integer number (148954869).

Almost surely, 2^1021243204 is an apocalyptic number.

It is an amenable number.

1021243204 is a deficient number, since it is larger than the sum of its proper divisors (766215224).

1021243204 is a wasteful number, since it uses less digits than its factorization.

1021243204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40406 (or 40404 counting only the distinct ones).

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

The square root of 1021243204 is about 31956.8960319991. The cubic root of 1021243204 is about 1007.0315099831.

Adding to 1021243204 its reverse (4023421201), we get a palindrome (5044664405).

The spelling of 1021243204 in words is "one billion, twenty-one million, two hundred forty-three thousand, two hundred four".