12159881 has 2 divisors, whose sum is σ = 12159882. Its totient is φ = 12159880.

The previous prime is 12159877. The next prime is 12159899. The reversal of 12159881 is 18895121.

12159881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6943225 + 5216656 = 2635^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 12159881 - 2² = 12159877 is a prime.

It is a super-2 number, since 2×12159881² = 295725411868322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12159181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6079940 + 6079941.

It is an arithmetic number, because the mean of its divisors is an integer number (6079941).

Almost surely, 2^12159881 is an apocalyptic number.

It is an amenable number.

12159881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12159881 is an equidigital number, since it uses as much as digits as its factorization.

12159881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 35.

The square root of 12159881 is about 3487.1020919956. The cubic root of 12159881 is about 229.9551330251.

Subtracting from 12159881 its sum of digits (35), we obtain a triangular number (12159846 = T₄₉₃₁).

The spelling of 12159881 in words is "twelve million, one hundred fifty-nine thousand, eight hundred eighty-one".