12695905 has 4 divisors (see below), whose sum is σ = 15235092. Its totient is φ = 10156720.

The previous prime is 12695899. The next prime is 12695909. The reversal of 12695905 is 50959621.

12695905 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50959621 = 73 ⋅698077.

It can be written as a sum of positive squares in 2 ways, for example, as 6305121 + 6390784 = 2511^2 + 2528^2 .

It is not a de Polignac number, because 12695905 - 2⁵ = 12695873 is a prime.

It is a super-2 number, since 2×12695905² = 322372007538050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12695909) 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, 1269586 + ... + 1269595.

It is an arithmetic number, because the mean of its divisors is an integer number (3808773).

Almost surely, 2^12695905 is an apocalyptic number.

It is an amenable number.

12695905 is a deficient number, since it is larger than the sum of its proper divisors (2539187).

12695905 is an equidigital number, since it uses as much as digits as its factorization.

12695905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539186.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 12695905 is about 3563.1313475649. The cubic root of 12695905 is about 233.2855763939.

The spelling of 12695905 in words is "twelve million, six hundred ninety-five thousand, nine hundred five".