125820017 has 8 divisors (see below), whose sum is σ = 129365376. Its totient is φ = 122282352.

The previous prime is 125820007. The next prime is 125820029. The reversal of 125820017 is 710028521.

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 125820017 - 2⁸ = 125819761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125820007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51608 + ... + 53990.

It is an arithmetic number, because the mean of its divisors is an integer number (16170672).

Almost surely, 2^125820017 is an apocalyptic number.

It is an amenable number.

125820017 is a deficient number, since it is larger than the sum of its proper divisors (3545359).

125820017 is a wasteful number, since it uses less digits than its factorization.

125820017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 125820017 is about 11216.9522152856. The cubic root of 125820017 is about 501.0909738209.

Adding to 125820017 its reverse (710028521), we get a palindrome (835848538).

The spelling of 125820017 in words is "one hundred twenty-five million, eight hundred twenty thousand, seventeen".