125711947 has 2 divisors, whose sum is σ = 125711948. Its totient is φ = 125711946.

The previous prime is 125711939. The next prime is 125711953. The reversal of 125711947 is 749117521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125711947 - 2³ = 125711939 is a prime.

It is not a weakly prime, because it can be changed into another prime (125711987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62855973 + 62855974.

It is an arithmetic number, because the mean of its divisors is an integer number (62855974).

Almost surely, 2^125711947 is an apocalyptic number.

125711947 is a deficient number, since it is larger than the sum of its proper divisors (1).

125711947 is an equidigital number, since it uses as much as digits as its factorization.

125711947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 37.

The square root of 125711947 is about 11212.1339182156. The cubic root of 125711947 is about 500.9474661484.

The spelling of 125711947 in words is "one hundred twenty-five million, seven hundred eleven thousand, nine hundred forty-seven".