12750505 has 4 divisors (see below), whose sum is σ = 15300612. Its totient is φ = 10200400.

The previous prime is 12750499. The next prime is 12750511. The reversal of 12750505 is 50505721.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (12750499) and next prime (12750511).

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 8637721 = 2028^2 + 2939^2 .

It is not a de Polignac number, because 12750505 - 2³ = 12750497 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 12750505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275046 + ... + 1275055.

It is an arithmetic number, because the mean of its divisors is an integer number (3825153).

Almost surely, 2^12750505 is an apocalyptic number.

It is an amenable number.

12750505 is a deficient number, since it is larger than the sum of its proper divisors (2550107).

12750505 is an equidigital number, since it uses as much as digits as its factorization.

12750505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550106.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 12750505 is about 3570.7849277155. The cubic root of 12750505 is about 233.6195207248.

The spelling of 12750505 in words is "twelve million, seven hundred fifty thousand, five hundred five".