12180071 has 4 divisors (see below), whose sum is σ = 12188352. Its totient is φ = 12171792.

The previous prime is 12180061. The next prime is 12180073. The reversal of 12180071 is 17008121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12180071 - 2¹⁰ = 12179047 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 (12180073) 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, 1271 + ... + 5096.

It is an arithmetic number, because the mean of its divisors is an integer number (3047088).

Almost surely, 2^12180071 is an apocalyptic number.

12180071 is a deficient number, since it is larger than the sum of its proper divisors (8281).

12180071 is an equidigital number, since it uses as much as digits as its factorization.

12180071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8280.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 12180071 is about 3489.9958452697. The cubic root of 12180071 is about 230.0823334724.

Adding to 12180071 its reverse (17008121), we get a palindrome (29188192).

The spelling of 12180071 in words is "twelve million, one hundred eighty thousand, seventy-one".