1021543252 has 12 divisors (see below), whose sum is σ = 1865426976. Its totient is φ = 488564120.

The previous prime is 1021543247. The next prime is 1021543267. The reversal of 1021543252 is 2523451201.

1021543252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5551774 + ... + 5551957.

It is an arithmetic number, because the mean of its divisors is an integer number (155452248).

Almost surely, 2^1021543252 is an apocalyptic number.

It is an amenable number.

1021543252 is a deficient number, since it is larger than the sum of its proper divisors (843883724).

1021543252 is a wasteful number, since it uses less digits than its factorization.

1021543252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11103758 (or 11103756 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1021543252 is about 31961.5902608115. The cubic root of 1021543252 is about 1007.1301244960.

Adding to 1021543252 its reverse (2523451201), we get a palindrome (3544994453).

The spelling of 1021543252 in words is "one billion, twenty-one million, five hundred forty-three thousand, two hundred fifty-two".