12757505 has 4 divisors (see below), whose sum is σ = 15309012. Its totient is φ = 10206000.

The previous prime is 12757501. The next prime is 12757517. The reversal of 12757505 is 50575721.

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 7333264 + 5424241 = 2708^2 + 2329^2 .

It is not a de Polignac number, because 12757505 - 2² = 12757501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12757501) 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, 1275746 + ... + 1275755.

It is an arithmetic number, because the mean of its divisors is an integer number (3827253).

Almost surely, 2^12757505 is an apocalyptic number.

It is an amenable number.

12757505 is a deficient number, since it is larger than the sum of its proper divisors (2551507).

12757505 is an equidigital number, since it uses as much as digits as its factorization.

12757505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551506.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 12757505 is about 3571.7649698713. The cubic root of 12757505 is about 233.6622651094.

The spelling of 12757505 in words is "twelve million, seven hundred fifty-seven thousand, five hundred five".