12697855 has 4 divisors (see below), whose sum is σ = 15237432. Its totient is φ = 10158280.

The previous prime is 12697847. The next prime is 12697859. The reversal of 12697855 is 55879621.

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

It is not a de Polignac number, because 12697855 - 2³ = 12697847 is a prime.

It is a super-2 number, since 2×12697855² = 322471043202050, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697859) by changing a digit.

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, 1269781 + ... + 1269790.

It is an arithmetic number, because the mean of its divisors is an integer number (3809358).

Almost surely, 2^12697855 is an apocalyptic number.

12697855 is a deficient number, since it is larger than the sum of its proper divisors (2539577).

12697855 is an equidigital number, since it uses as much as digits as its factorization.

12697855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539576.

The product of its digits is 151200, while the sum is 43.

The square root of 12697855 is about 3563.4049727753. The cubic root of 12697855 is about 233.2975194466.

The spelling of 12697855 in words is "twelve million, six hundred ninety-seven thousand, eight hundred fifty-five".