129225197 has 2 divisors, whose sum is σ = 129225198. Its totient is φ = 129225196.

The previous prime is 129225133. The next prime is 129225221. The reversal of 129225197 is 791522921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127893481 + 1331716 = 11309^2 + 1154^2 .

It is a cyclic number.

It is not a de Polignac number, because 129225197 - 2⁶ = 129225133 is a prime.

It is a Chen prime.

It is equal to p_7336748 and since 129225197 and 7336748 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129225197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129225697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64612598 + 64612599.

It is an arithmetic number, because the mean of its divisors is an integer number (64612599).

Almost surely, 2^129225197 is an apocalyptic number.

It is an amenable number.

129225197 is a deficient number, since it is larger than the sum of its proper divisors (1).

129225197 is an equidigital number, since it uses as much as digits as its factorization.

129225197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 129225197 is about 11367.7261138717. The cubic root of 129225197 is about 505.5712869521.

The spelling of 129225197 in words is "one hundred twenty-nine million, two hundred twenty-five thousand, one hundred ninety-seven".