125209971 has 12 divisors (see below), whose sum is σ = 180999000. Its totient is φ = 83408640.

The previous prime is 125209967. The next prime is 125209979. The reversal of 125209971 is 179902521.

It is not a de Polignac number, because 125209971 - 2² = 125209967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125209979) 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 in 11 ways as a sum of consecutive naturals, for example, 8851 + ... + 18131.

It is an arithmetic number, because the mean of its divisors is an integer number (15083250).

Almost surely, 2^125209971 is an apocalyptic number.

125209971 is a deficient number, since it is larger than the sum of its proper divisors (55789029).

125209971 is a wasteful number, since it uses less digits than its factorization.

125209971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10786 (or 10783 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 125209971 is about 11189.7261360589. The cubic root of 125209971 is about 500.2798047228.

The spelling of 125209971 in words is "one hundred twenty-five million, two hundred nine thousand, nine hundred seventy-one".