12180807 has 32 divisors (see below), whose sum is σ = 18878400. Its totient is φ = 7755264.

The previous prime is 12180803. The next prime is 12180821. The reversal of 12180807 is 70808121.

It is not a de Polignac number, because 12180807 - 2² = 12180803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12180803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88843 + ... + 88979.

It is an arithmetic number, because the mean of its divisors is an integer number (589950).

Almost surely, 2^12180807 is an apocalyptic number.

12180807 is a deficient number, since it is larger than the sum of its proper divisors (6697593).

12180807 is a wasteful number, since it uses less digits than its factorization.

12180807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 12180807 is about 3490.1012879285. The cubic root of 12180807 is about 230.0869677417.

Adding to 12180807 its reverse (70808121), we get a palindrome (82988928).

The spelling of 12180807 in words is "twelve million, one hundred eighty thousand, eight hundred seven".