12309207 has 16 divisors (see below), whose sum is σ = 18293760. Its totient is φ = 7316352.

The previous prime is 12309191. The next prime is 12309233. The reversal of 12309207 is 70290321.

It is not a de Polignac number, because 12309207 - 2⁴ = 12309191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12309247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5383 + ... + 7320.

It is an arithmetic number, because the mean of its divisors is an integer number (1143360).

Almost surely, 2^12309207 is an apocalyptic number.

12309207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12309207 is a deficient number, since it is larger than the sum of its proper divisors (5984553).

12309207 is a wasteful number, since it uses less digits than its factorization.

12309207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12742.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 12309207 is about 3508.4479474548. The cubic root of 12309207 is about 230.8926057639.

Adding to 12309207 its reverse (70290321), we get a palindrome (82599528).

The spelling of 12309207 in words is "twelve million, three hundred nine thousand, two hundred seven".