125217849 has 16 divisors (see below), whose sum is σ = 173193152. Its totient is φ = 80414208.

The previous prime is 125217803. The next prime is 125217871. The reversal of 125217849 is 948712521.

It is not a de Polignac number, because 125217849 - 2⁸ = 125217593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125217889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2769 + ... + 16065.

It is an arithmetic number, because the mean of its divisors is an integer number (10824572).

Almost surely, 2^125217849 is an apocalyptic number.

It is an amenable number.

125217849 is a deficient number, since it is larger than the sum of its proper divisors (47975303).

125217849 is a wasteful number, since it uses less digits than its factorization.

125217849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13416.

The product of its digits is 40320, while the sum is 39.

The square root of 125217849 is about 11190.0781498612. The cubic root of 125217849 is about 500.2902967563.

The spelling of 125217849 in words is "one hundred twenty-five million, two hundred seventeen thousand, eight hundred forty-nine".