12021797 has 2 divisors, whose sum is σ = 12021798. Its totient is φ = 12021796.

The previous prime is 12021761. The next prime is 12021809. The reversal of 12021797 is 79712021.

12021797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11792356 + 229441 = 3434^2 + 479^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021797 - 2¹² = 12017701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12023797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010898 + 6010899.

It is an arithmetic number, because the mean of its divisors is an integer number (6010899).

Almost surely, 2^12021797 is an apocalyptic number.

It is an amenable number.

12021797 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021797 is an equidigital number, since it uses as much as digits as its factorization.

12021797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 12021797 is about 3467.2463137193. The cubic root of 12021797 is about 229.0813832008.

It can be divided in two parts, 1202179 and 7, that multiplied together give a triangular number (8415253 = T₄₁₀₂).

The spelling of 12021797 in words is "twelve million, twenty-one thousand, seven hundred ninety-seven".