12757205 has 4 divisors (see below), whose sum is σ = 15308652. Its totient is φ = 10205760.

The previous prime is 12757201. The next prime is 12757219. The reversal of 12757205 is 50275721.

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 9778129 + 2979076 = 3127^2 + 1726^2 .

It is not a de Polignac number, because 12757205 - 2² = 12757201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12757201) by changing a digit.

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, 1275716 + ... + 1275725.

It is an arithmetic number, because the mean of its divisors is an integer number (3827163).

Almost surely, 2^12757205 is an apocalyptic number.

It is an amenable number.

12757205 is a deficient number, since it is larger than the sum of its proper divisors (2551447).

12757205 is an equidigital number, since it uses as much as digits as its factorization.

12757205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551446.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 12757205 is about 3571.7229735801. The cubic root of 12757205 is about 233.6604335280.

The spelling of 12757205 in words is "twelve million, seven hundred fifty-seven thousand, two hundred five".