1021543204 has 24 divisors (see below), whose sum is σ = 1968120000. Its totient is φ = 460075680.

The previous prime is 1021543199. The next prime is 1021543223. The reversal of 1021543204 is 4023451201.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101704 + ... + 111295.

It is an arithmetic number, because the mean of its divisors is an integer number (82005000).

Almost surely, 2^1021543204 is an apocalyptic number.

It is an amenable number.

1021543204 is a deficient number, since it is larger than the sum of its proper divisors (946576796).

1021543204 is a wasteful number, since it uses less digits than its factorization.

1021543204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213123 (or 213121 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1021543204 is about 31961.5895099102. The cubic root of 1021543204 is about 1007.1301087217.

Adding to 1021543204 its reverse (4023451201), we get a palindrome (5044994405).

The spelling of 1021543204 in words is "one billion, twenty-one million, five hundred forty-three thousand, two hundred four".