125617129 has 8 divisors (see below), whose sum is σ = 137118240. Its totient is φ = 114129600.

The previous prime is 125617111. The next prime is 125617139. The reversal of 125617129 is 921716521.

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 125617129 - 2²³ = 117228521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125617094 and 125617103.

It is not an unprimeable number, because it can be changed into a prime (125617139) 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 7 ways as a sum of consecutive naturals, for example, 32502 + ... + 36160.

It is an arithmetic number, because the mean of its divisors is an integer number (17139780).

Almost surely, 2^125617129 is an apocalyptic number.

It is an amenable number.

125617129 is a deficient number, since it is larger than the sum of its proper divisors (11501111).

125617129 is a wasteful number, since it uses less digits than its factorization.

125617129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791.

The product of its digits is 7560, while the sum is 34.

The square root of 125617129 is about 11207.9047551271. The cubic root of 125617129 is about 500.8214882416.

The spelling of 125617129 in words is "one hundred twenty-five million, six hundred seventeen thousand, one hundred twenty-nine".