12081801 has 8 divisors (see below), whose sum is σ = 16202880. Its totient is φ = 8007632.

The previous prime is 12081799. The next prime is 12081809. The reversal of 12081801 is 10818021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12081801 - 2¹ = 12081799 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12081809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11121 + ... + 12158.

It is an arithmetic number, because the mean of its divisors is an integer number (2025360).

Almost surely, 2^12081801 is an apocalyptic number.

It is an amenable number.

12081801 is a deficient number, since it is larger than the sum of its proper divisors (4121079).

12081801 is a wasteful number, since it uses less digits than its factorization.

12081801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23455.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 12081801 is about 3475.8885195012. Note that the first 3 decimals coincide. The cubic root of 12081801 is about 229.4618862951.

Adding to 12081801 its reverse (10818021), we get a palindrome (22899822).

It can be divided in two parts, 1 and 2081801, that added together give a palindrome (2081802).

The spelling of 12081801 in words is "twelve million, eighty-one thousand, eight hundred one".