1020531256 has 16 divisors (see below), whose sum is σ = 1919282040. Its totient is φ = 508722720.

The previous prime is 1020531241. The next prime is 1020531293. The reversal of 1020531256 is 6521350201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020531256.

It is a congruent number.

It is an unprimeable number.

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, 190051 + ... + 195346.

Almost surely, 2^1020531256 is an apocalyptic number.

It is an amenable number.

1020531256 is a deficient number, since it is larger than the sum of its proper divisors (898750784).

1020531256 is a wasteful number, since it uses less digits than its factorization.

1020531256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385734 (or 385730 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1020531256 is about 31945.7548979516. The cubic root of 1020531256 is about 1006.7974420886.

Adding to 1020531256 its reverse (6521350201), we get a palindrome (7541881457).

The spelling of 1020531256 in words is "one billion, twenty million, five hundred thirty-one thousand, two hundred fifty-six".