125971799 has 2 divisors, whose sum is σ = 125971800. Its totient is φ = 125971798.

The previous prime is 125971789. The next prime is 125971861. The reversal of 125971799 is 997179521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125971799 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 (125971709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62985899 + 62985900.

It is an arithmetic number, because the mean of its divisors is an integer number (62985900).

Almost surely, 2^125971799 is an apocalyptic number.

125971799 is a deficient number, since it is larger than the sum of its proper divisors (1).

125971799 is an equidigital number, since it uses as much as digits as its factorization.

125971799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 50.

The square root of 125971799 is about 11223.7159176451. The cubic root of 125971799 is about 501.2923885853.

The spelling of 125971799 in words is "one hundred twenty-five million, nine hundred seventy-one thousand, seven hundred ninety-nine".