125666847 has 12 divisors (see below), whose sum is σ = 182197080. Its totient is φ = 83464848.

The previous prime is 125666833. The next prime is 125666903. The reversal of 125666847 is 748666521.

It is a de Polignac number, because none of the positive numbers 2^k-125666847 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125666347) 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, 23533 + ... + 28374.

It is an arithmetic number, because the mean of its divisors is an integer number (15183090).

Almost surely, 2^125666847 is an apocalyptic number.

125666847 is a deficient number, since it is larger than the sum of its proper divisors (56530233).

125666847 is a wasteful number, since it uses less digits than its factorization.

125666847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52182 (or 52179 counting only the distinct ones).

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

The square root of 125666847 is about 11210.1225238621. The cubic root of 125666847 is about 500.8875529008.

The spelling of 125666847 in words is "one hundred twenty-five million, six hundred sixty-six thousand, eight hundred forty-seven".