125686647 has 12 divisors (see below), whose sum is σ = 188271720. Its totient is φ = 83790936.

The previous prime is 125686643. The next prime is 125686663. The reversal of 125686647 is 746686521.

It is not a de Polignac number, because 125686647 - 2² = 125686643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125686643) 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, 258372 + ... + 258857.

It is an arithmetic number, because the mean of its divisors is an integer number (15689310).

Almost surely, 2^125686647 is an apocalyptic number.

125686647 is a deficient number, since it is larger than the sum of its proper divisors (62585073).

125686647 is an frugal number, since it uses more digits than its factorization.

125686647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517244 (or 517232 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 125686647 is about 11211.0056194795. The cubic root of 125686647 is about 500.9138580427.

The spelling of 125686647 in words is "one hundred twenty-five million, six hundred eighty-six thousand, six hundred forty-seven".