12345207 has 24 divisors (see below), whose sum is σ = 19318896. Its totient is φ = 6991488.

The previous prime is 12345191. The next prime is 12345209. The reversal of 12345207 is 70254321.

It is not a de Polignac number, because 12345207 - 2⁴ = 12345191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345209) 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, 19833 + ... + 20445.

It is an arithmetic number, because the mean of its divisors is an integer number (804954).

Almost surely, 2^12345207 is an apocalyptic number.

12345207 is a deficient number, since it is larger than the sum of its proper divisors (6973689).

12345207 is a wasteful number, since it uses less digits than its factorization.

12345207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 12345207 is about 3513.5746754552. The cubic root of 12345207 is about 231.1174792703.

Adding to 12345207 its reverse (70254321), we get a palindrome (82599528).

It can be divided in two parts, 1234 and 5207, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 12345207 in words is "twelve million, three hundred forty-five thousand, two hundred seven".