125909517 has 8 divisors (see below), whose sum is σ = 167993280. Its totient is φ = 83882720.

The previous prime is 125909477. The next prime is 125909527. The reversal of 125909517 is 715909521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125909517 - 2⁶ = 125909453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125909527) 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, 8784 + ... + 18137.

It is an arithmetic number, because the mean of its divisors is an integer number (20999160).

Almost surely, 2^125909517 is an apocalyptic number.

It is an amenable number.

125909517 is a deficient number, since it is larger than the sum of its proper divisors (42083763).

125909517 is a wasteful number, since it uses less digits than its factorization.

125909517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28483.

The product of its (nonzero) digits is 28350, while the sum is 39.

The square root of 125909517 is about 11220.9410033205. The cubic root of 125909517 is about 501.2097599345.

The spelling of 125909517 in words is "one hundred twenty-five million, nine hundred nine thousand, five hundred seventeen".