125705517 has 16 divisors (see below), whose sum is σ = 198157440. Its totient is φ = 69354432.

The previous prime is 125705513. The next prime is 125705519. The reversal of 125705517 is 715507521.

It is not a de Polignac number, because 125705517 - 2² = 125705513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125705513) 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 15 ways as a sum of consecutive naturals, for example, 102598 + ... + 103815.

It is an arithmetic number, because the mean of its divisors is an integer number (12384840).

Almost surely, 2^125705517 is an apocalyptic number.

It is an amenable number.

125705517 is a deficient number, since it is larger than the sum of its proper divisors (72451923).

125705517 is a wasteful number, since it uses less digits than its factorization.

125705517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206452.

The product of its (nonzero) digits is 12250, while the sum is 33.

The square root of 125705517 is about 11211.8471716306. The cubic root of 125705517 is about 500.9389250691.

The spelling of 125705517 in words is "one hundred twenty-five million, seven hundred five thousand, five hundred seventeen".