1021503897 has 12 divisors (see below), whose sum is σ = 1553164080. Its totient is φ = 645160248.

The previous prime is 1021503893. The next prime is 1021503907. The reversal of 1021503897 is 7983051201.

It is not a de Polignac number, because 1021503897 - 2² = 1021503893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021503893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2986683 + ... + 2987024.

It is an arithmetic number, because the mean of its divisors is an integer number (129430340).

Almost surely, 2^1021503897 is an apocalyptic number.

It is an amenable number.

1021503897 is a deficient number, since it is larger than the sum of its proper divisors (531660183).

1021503897 is a wasteful number, since it uses less digits than its factorization.

1021503897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5973732 (or 5973729 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1021503897 is about 31960.9745940264. The cubic root of 1021503897 is about 1007.1171910854.

The spelling of 1021503897 in words is "one billion, twenty-one million, five hundred three thousand, eight hundred ninety-seven".