12023861 has 2 divisors, whose sum is σ = 12023862. Its totient is φ = 12023860.

The previous prime is 12023857. The next prime is 12023863. The reversal of 12023861 is 16832021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10080625 + 1943236 = 3175^2 + 1394^2 .

It is a cyclic number.

It is not a de Polignac number, because 12023861 - 2² = 12023857 is a prime.

Together with 12023863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12023863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011930 + 6011931.

It is an arithmetic number, because the mean of its divisors is an integer number (6011931).

Almost surely, 2^12023861 is an apocalyptic number.

It is an amenable number.

12023861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12023861 is an equidigital number, since it uses as much as digits as its factorization.

12023861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 12023861 is about 3467.5439434851. The cubic root of 12023861 is about 229.0944926364.

Adding to 12023861 its reverse (16832021), we get a palindrome (28855882).

The spelling of 12023861 in words is "twelve million, twenty-three thousand, eight hundred sixty-one".