125649171 has 8 divisors (see below), whose sum is σ = 186146960. Its totient is φ = 83766096.

The previous prime is 125649149. The next prime is 125649179. The reversal of 125649171 is 171946521.

125649171 is a `hidden beast` number, since 1 + 2 + 5 + 649 + 1 + 7 + 1 = 666.

It is not a de Polignac number, because 125649171 - 2¹⁰ = 125648147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125649179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2326810 + ... + 2326863.

It is an arithmetic number, because the mean of its divisors is an integer number (23268370).

Almost surely, 2^125649171 is an apocalyptic number.

125649171 is a deficient number, since it is larger than the sum of its proper divisors (60497789).

125649171 is an equidigital number, since it uses as much as digits as its factorization.

125649171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4653682 (or 4653676 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 125649171 is about 11209.3341015423. The cubic root of 125649171 is about 500.8640672487.

The spelling of 125649171 in words is "one hundred twenty-five million, six hundred forty-nine thousand, one hundred seventy-one".