125561217 has 8 divisors (see below), whose sum is σ = 168733696. Its totient is φ = 83048112.

The previous prime is 125561203. The next prime is 125561243. The reversal of 125561217 is 712165521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125561217 - 2⁶ = 125561153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125561287) 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, 164398 + ... + 165159.

It is an arithmetic number, because the mean of its divisors is an integer number (21091712).

Almost surely, 2^125561217 is an apocalyptic number.

It is an amenable number.

125561217 is a deficient number, since it is larger than the sum of its proper divisors (43172479).

125561217 is a wasteful number, since it uses less digits than its factorization.

125561217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329687.

The product of its digits is 4200, while the sum is 30.

The square root of 125561217 is about 11205.4101665222. The cubic root of 125561217 is about 500.7471722444.

The spelling of 125561217 in words is "one hundred twenty-five million, five hundred sixty-one thousand, two hundred seventeen".