1012019985 has 12 divisors (see below), whose sum is σ = 1754168052. Its totient is φ = 539743968.

The previous prime is 1012019887. The next prime is 1012019993. The reversal of 1012019985 is 5899102101.

It can be written as a sum of positive squares in 2 ways, for example, as 360392256 + 651627729 = 18984^2 + 25527^2 .

It is not a de Polignac number, because 1012019985 - 2²⁷ = 877802257 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 11244622 + ... + 11244711.

It is an arithmetic number, because the mean of its divisors is an integer number (146180671).

Almost surely, 2^1012019985 is an apocalyptic number.

1012019985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1012019985 is a deficient number, since it is larger than the sum of its proper divisors (742148067).

1012019985 is a wasteful number, since it uses less digits than its factorization.

1012019985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22489344 (or 22489341 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 1012019985 is about 31812.2615511692. The cubic root of 1012019985 is about 1003.9907146779.

The spelling of 1012019985 in words is "one billion, twelve million, nineteen thousand, nine hundred eighty-five".