12705705 has 12 divisors (see below), whose sum is σ = 22023300. Its totient is φ = 6776352.

The previous prime is 12705703. The next prime is 12705731. The reversal of 12705705 is 50750721.

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 4272489 = 2904^2 + 2067^2 .

It is not a de Polignac number, because 12705705 - 2¹ = 12705703 is a prime.

It is a super-2 number, since 2×12705705² = 322869879094050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12705703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141130 + ... + 141219.

It is an arithmetic number, because the mean of its divisors is an integer number (1835275).

Almost surely, 2^12705705 is an apocalyptic number.

12705705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12705705 is a deficient number, since it is larger than the sum of its proper divisors (9317595).

12705705 is a wasteful number, since it uses less digits than its factorization.

12705705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282360 (or 282357 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 12705705 is about 3564.5062771722. The cubic root of 12705705 is about 233.3455855244.

The spelling of 12705705 in words is "twelve million, seven hundred five thousand, seven hundred five".