125706517 has 8 divisors (see below), whose sum is σ = 133450200. Its totient is φ = 118001664.

The previous prime is 125706499. The next prime is 125706557. The reversal of 125706517 is 715607521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38862756 + 86843761 = 6234^2 + 9319^2 .

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 125706517 - 2¹⁹ = 125182229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125706557) 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, 2892 + ... + 16117.

It is an arithmetic number, because the mean of its divisors is an integer number (16681275).

Almost surely, 2^125706517 is an apocalyptic number.

125706517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

125706517 is a deficient number, since it is larger than the sum of its proper divisors (7743683).

125706517 is a wasteful number, since it uses less digits than its factorization.

125706517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19415.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 125706517 is about 11211.8917672264. The cubic root of 125706517 is about 500.9402534054.

The spelling of 125706517 in words is "one hundred twenty-five million, seven hundred six thousand, five hundred seventeen".