125512171 has 4 divisors (see below), whose sum is σ = 125601192. Its totient is φ = 125423152.

The previous prime is 125512147. The next prime is 125512181. The reversal of 125512171 is 171215521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125512171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125512181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42361 + ... + 45226.

It is an arithmetic number, because the mean of its divisors is an integer number (31400298).

Almost surely, 2^125512171 is an apocalyptic number.

125512171 is a deficient number, since it is larger than the sum of its proper divisors (89021).

125512171 is an equidigital number, since it uses as much as digits as its factorization.

125512171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89020.

The product of its digits is 700, while the sum is 25.

The square root of 125512171 is about 11203.2214563491. The cubic root of 125512171 is about 500.6819640937.

Adding to 125512171 its reverse (171215521), we get a palindrome (296727692).

The spelling of 125512171 in words is "one hundred twenty-five million, five hundred twelve thousand, one hundred seventy-one".