12071881 has 4 divisors (see below), whose sum is σ = 12079764. Its totient is φ = 12064000.

The previous prime is 12071869. The next prime is 12071923. The reversal of 12071881 is 18817021.

12071881 is digitally balanced in base 2, 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 9096256 + 2975625 = 3016^2 + 1725^2 .

It is a cyclic number.

It is not a de Polignac number, because 12071881 - 2¹⁵ = 12039113 is a prime.

It is a super-2 number, since 2×12071881² = 291460621756322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12071281) 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, 820 + ... + 4981.

It is an arithmetic number, because the mean of its divisors is an integer number (3019941).

Almost surely, 2^12071881 is an apocalyptic number.

It is an amenable number.

12071881 is a deficient number, since it is larger than the sum of its proper divisors (7883).

12071881 is an equidigital number, since it uses as much as digits as its factorization.

12071881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7882.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 12071881 is about 3474.4612532017. The cubic root of 12071881 is about 229.3990677030.

The spelling of 12071881 in words is "twelve million, seventy-one thousand, eight hundred eighty-one".