125129871 has 12 divisors (see below), whose sum is σ = 184947048. Its totient is φ = 81479664.

The previous prime is 125129863. The next prime is 125129897. The reversal of 125129871 is 178921521.

It is a happy number.

It is not a de Polignac number, because 125129871 - 2³ = 125129863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125129831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161280 + ... + 162053.

It is an arithmetic number, because the mean of its divisors is an integer number (15412254).

Almost surely, 2^125129871 is an apocalyptic number.

125129871 is a deficient number, since it is larger than the sum of its proper divisors (59817177).

125129871 is a wasteful number, since it uses less digits than its factorization.

125129871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323382 (or 323379 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 125129871 is about 11186.1463873847. The cubic root of 125129871 is about 500.1731013982.

The spelling of 125129871 in words is "one hundred twenty-five million, one hundred twenty-nine thousand, eight hundred seventy-one".