12785197 has 2 divisors, whose sum is σ = 12785198. Its totient is φ = 12785196.

The previous prime is 12785189. The next prime is 12785203. The reversal of 12785197 is 79158721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11464996 + 1320201 = 3386^2 + 1149^2 .

It is a cyclic number.

It is not a de Polignac number, because 12785197 - 2³ = 12785189 is a prime.

It is a super-2 number, since 2×12785197² = 326922524657618, which contains 22 as substring.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12785107) 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, 6392598 + 6392599.

It is an arithmetic number, because the mean of its divisors is an integer number (6392599).

Almost surely, 2^12785197 is an apocalyptic number.

It is an amenable number.

12785197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12785197 is an equidigital number, since it uses as much as digits as its factorization.

12785197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 40.

The square root of 12785197 is about 3575.6393833831. The cubic root of 12785197 is about 233.8312087838.

The spelling of 12785197 in words is "twelve million, seven hundred eighty-five thousand, one hundred ninety-seven".