12177881 has 2 divisors, whose sum is σ = 12177882. Its totient is φ = 12177880.

The previous prime is 12177871. The next prime is 12177887. The reversal of 12177881 is 18877121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7070281 + 5107600 = 2659^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 12177881 - 2⁶ = 12177817 is a prime.

It is a super-2 number, since 2×12177881² = 296601571300322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12177887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6088940 + 6088941.

It is an arithmetic number, because the mean of its divisors is an integer number (6088941).

Almost surely, 2^12177881 is an apocalyptic number.

It is an amenable number.

12177881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12177881 is an equidigital number, since it uses as much as digits as its factorization.

12177881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6272, while the sum is 35.

The square root of 12177881 is about 3489.6820772099. The cubic root of 12177881 is about 230.0685428984.

The spelling of 12177881 in words is "twelve million, one hundred seventy-seven thousand, eight hundred eighty-one".