12345705 has 12 divisors (see below), whose sum is σ = 21399300. Its totient is φ = 6584352.

The previous prime is 12345701. The next prime is 12345709. The reversal of 12345705 is 50754321.

It is a happy number.

12345705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12345701) and next prime (12345709).

It can be written as a sum of positive squares in 2 ways, for example, as 5184729 + 7160976 = 2277^2 + 2676^2 .

It is not a de Polignac number, because 12345705 - 2² = 12345701 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12345701) 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, 137130 + ... + 137219.

It is an arithmetic number, because the mean of its divisors is an integer number (1783275).

Almost surely, 2^12345705 is an apocalyptic number.

12345705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12345705 is a deficient number, since it is larger than the sum of its proper divisors (9053595).

12345705 is a wasteful number, since it uses less digits than its factorization.

12345705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274360 (or 274357 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 12345705 is about 3513.6455427376. The cubic root of 12345705 is about 231.1205869529.

The spelling of 12345705 in words is "twelve million, three hundred forty-five thousand, seven hundred five".