12705775 has 24 divisors (see below), whose sum is σ = 17320320. Its totient is φ = 9203040.

The previous prime is 12705773. The next prime is 12705811. The reversal of 12705775 is 57750721.

It is not a de Polignac number, because 12705775 - 2¹ = 12705773 is a prime.

It is a super-2 number, since 2×12705775² = 322873436701250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12705775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10344 + ... + 11506.

It is an arithmetic number, because the mean of its divisors is an integer number (721680).

Almost surely, 2^12705775 is an apocalyptic number.

12705775 is a deficient number, since it is larger than the sum of its proper divisors (4614545).

12705775 is a wasteful number, since it uses less digits than its factorization.

12705775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 12705775 is about 3564.5160961903. The cubic root of 12705775 is about 233.3460140501.

The spelling of 12705775 in words is "twelve million, seven hundred five thousand, seven hundred seventy-five".