12077861 has 2 divisors, whose sum is σ = 12077862. Its totient is φ = 12077860.

The previous prime is 12077809. The next prime is 12077867. The reversal of 12077861 is 16877021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 1515361 = 3250^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 12077861 - 2¹⁸ = 11815717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12077867) 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 as a sum of consecutive naturals, namely, 6038930 + 6038931.

It is an arithmetic number, because the mean of its divisors is an integer number (6038931).

Almost surely, 2^12077861 is an apocalyptic number.

It is an amenable number.

12077861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12077861 is an equidigital number, since it uses as much as digits as its factorization.

12077861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 12077861 is about 3475.3217117268. The cubic root of 12077861 is about 229.4369402867.

The spelling of 12077861 in words is "twelve million, seventy-seven thousand, eight hundred sixty-one".