1012021859 has 4 divisors (see below), whose sum is σ = 1026275760. Its totient is φ = 997767960.

The previous prime is 1012021853. The next prime is 1012021897. The reversal of 1012021859 is 9581202101.

1012021859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012021859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012021853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7126844 + ... + 7126985.

It is an arithmetic number, because the mean of its divisors is an integer number (256568940).

Almost surely, 2^1012021859 is an apocalyptic number.

1012021859 is a deficient number, since it is larger than the sum of its proper divisors (14253901).

1012021859 is an equidigital number, since it uses as much as digits as its factorization.

1012021859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14253900.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1012021859 is about 31812.2910052074. The cubic root of 1012021859 is about 1003.9913343882.

The spelling of 1012021859 in words is "one billion, twelve million, twenty-one thousand, eight hundred fifty-nine".