1020915105 has 16 divisors (see below), whose sum is σ = 1866816384. Its totient is φ = 466704000.

The previous prime is 1020915089. The next prime is 1020915109. The reversal of 1020915105 is 5015190201.

It is not a de Polignac number, because 1020915105 - 2⁴ = 1020915089 is a prime.

It is a super-2 number, since 2×1020915105² = 2084535303234322050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020915109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4861396 + ... + 4861605.

It is an arithmetic number, because the mean of its divisors is an integer number (116676024).

Almost surely, 2^1020915105 is an apocalyptic number.

1020915105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020915105 is a deficient number, since it is larger than the sum of its proper divisors (845901279).

1020915105 is an equidigital number, since it uses as much as digits as its factorization.

1020915105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9723016.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 1020915105 is about 31951.7621579781. The cubic root of 1020915105 is about 1006.9236540483.

The spelling of 1020915105 in words is "one billion, twenty million, nine hundred fifteen thousand, one hundred five".