125620171 has 2 divisors, whose sum is σ = 125620172. Its totient is φ = 125620170.

The previous prime is 125620163. The next prime is 125620193. The reversal of 125620171 is 171026521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125620171 - 2³ = 125620163 is a prime.

It is not a weakly prime, because it can be changed into another prime (125624171) 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 as a sum of consecutive naturals, namely, 62810085 + 62810086.

It is an arithmetic number, because the mean of its divisors is an integer number (62810086).

Almost surely, 2^125620171 is an apocalyptic number.

125620171 is a deficient number, since it is larger than the sum of its proper divisors (1).

125620171 is an equidigital number, since it uses as much as digits as its factorization.

125620171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 125620171 is about 11208.0404620968. The cubic root of 125620171 is about 500.8255309140.

Adding to 125620171 its reverse (171026521), we get a palindrome (296646692).

The spelling of 125620171 in words is "one hundred twenty-five million, six hundred twenty thousand, one hundred seventy-one".