12055997 has 2 divisors, whose sum is σ = 12055998. Its totient is φ = 12055996.

The previous prime is 12055987. The next prime is 12056003. The reversal of 12055997 is 79955021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9665881 + 2390116 = 3109^2 + 1546^2 .

It is a cyclic number.

It is not a de Polignac number, because 12055997 - 2⁸ = 12055741 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12055997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12055957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6027998 + 6027999.

It is an arithmetic number, because the mean of its divisors is an integer number (6027999).

Almost surely, 2^12055997 is an apocalyptic number.

It is an amenable number.

12055997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12055997 is an equidigital number, since it uses as much as digits as its factorization.

12055997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 12055997 is about 3472.1746787856. The cubic root of 12055997 is about 229.2984102578.

The spelling of 12055997 in words is "twelve million, fifty-five thousand, nine hundred ninety-seven".