125676561 has 8 divisors (see below), whose sum is σ = 167650560. Its totient is φ = 83743472.

The previous prime is 125676559. The next prime is 125676571. The reversal of 125676561 is 165676521.

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 125676561 - 2¹ = 125676559 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (125676541) 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, 2145 + ... + 15998.

It is an arithmetic number, because the mean of its divisors is an integer number (20956320).

Almost surely, 2^125676561 is an apocalyptic number.

It is an amenable number.

125676561 is a deficient number, since it is larger than the sum of its proper divisors (41973999).

125676561 is a wasteful number, since it uses less digits than its factorization.

125676561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20455.

The product of its digits is 75600, while the sum is 39.

The square root of 125676561 is about 11210.5557846166. Note that the first 3 decimals coincide. The cubic root of 125676561 is about 500.9004587081.

The spelling of 125676561 in words is "one hundred twenty-five million, six hundred seventy-six thousand, five hundred sixty-one".