10120505 has 4 divisors (see below), whose sum is σ = 12144612. Its totient is φ = 8096400.

The previous prime is 10120493. The next prime is 10120519. The reversal of 10120505 is 50502101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5067001 + 5053504 = 2251^2 + 2248^2 .

It is not a de Polignac number, because 10120505 - 2⁴ = 10120489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10120505.

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 3 ways as a sum of consecutive naturals, for example, 1012046 + ... + 1012055.

It is an arithmetic number, because the mean of its divisors is an integer number (3036153).

Almost surely, 2^10120505 is an apocalyptic number.

It is an amenable number.

10120505 is a deficient number, since it is larger than the sum of its proper divisors (2024107).

10120505 is an equidigital number, since it uses as much as digits as its factorization.

10120505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024106.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 10120505 is about 3181.2741158221. The cubic root of 10120505 is about 216.3054164280.

Adding to 10120505 its reverse (50502101), we get a palindrome (60622606).

The spelling of 10120505 in words is "ten million, one hundred twenty thousand, five hundred five".