12401881 has 4 divisors (see below), whose sum is σ = 12411700. Its totient is φ = 12392064.

The previous prime is 12401867. The next prime is 12401887. The reversal of 12401881 is 18810421.

12401881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 can be written as a sum of positive squares in 2 ways, for example, as 2059225 + 10342656 = 1435^2 + 3216^2 .

It is a cyclic number.

It is not a de Polignac number, because 12401881 - 2⁹ = 12401369 is a prime.

It is a super-2 number, since 2×12401881² = 307613304676322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (12401887) 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, 2676 + ... + 5653.

It is an arithmetic number, because the mean of its divisors is an integer number (3102925).

Almost surely, 2^12401881 is an apocalyptic number.

It is an amenable number.

12401881 is a deficient number, since it is larger than the sum of its proper divisors (9819).

12401881 is an equidigital number, since it uses as much as digits as its factorization.

12401881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9818.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 12401881 is about 3521.6304462564. The cubic root of 12401881 is about 231.4706084684.

The spelling of 12401881 in words is "twelve million, four hundred one thousand, eight hundred eighty-one".