12400207 has 4 divisors (see below), whose sum is σ = 12610440. Its totient is φ = 12189976.

The previous prime is 12400183. The next prime is 12400231. The reversal of 12400207 is 70200421.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12400183) and next prime (12400231).

It is a cyclic number.

It is not a de Polignac number, because 12400207 - 2¹¹ = 12398159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105028 + ... + 105145.

It is an arithmetic number, because the mean of its divisors is an integer number (3152610).

Almost surely, 2^12400207 is an apocalyptic number.

12400207 is a deficient number, since it is larger than the sum of its proper divisors (210233).

12400207 is an equidigital number, since it uses as much as digits as its factorization.

12400207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210232.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 12400207 is about 3521.3927642341. The cubic root of 12400207 is about 231.4601934022.

Adding to 12400207 its reverse (70200421), we get a palindrome (82600628).

The spelling of 12400207 in words is "twelve million, four hundred thousand, two hundred seven".