1020634915 has 4 divisors (see below), whose sum is σ = 1224761904. Its totient is φ = 816507928.

The previous prime is 1020634889. The next prime is 1020634957. The reversal of 1020634915 is 5194360201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020634915 - 2¹³ = 1020626723 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102063487 + ... + 102063496.

It is an arithmetic number, because the mean of its divisors is an integer number (306190476).

Almost surely, 2^1020634915 is an apocalyptic number.

1020634915 is a deficient number, since it is larger than the sum of its proper divisors (204126989).

1020634915 is an equidigital number, since it uses as much as digits as its factorization.

1020634915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204126988.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1020634915 is about 31947.3772788941. The cubic root of 1020634915 is about 1006.8315289370.

The spelling of 1020634915 in words is "one billion, twenty million, six hundred thirty-four thousand, nine hundred fifteen".