125440171 has 2 divisors, whose sum is σ = 125440172. Its totient is φ = 125440170.

The previous prime is 125440169. The next prime is 125440177. The reversal of 125440171 is 171044521.

It is a weak prime.

It is an emirp because it is prime and its reverse (171044521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125440171 - 2¹ = 125440169 is a prime.

Together with 125440169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (125440177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62720085 + 62720086.

It is an arithmetic number, because the mean of its divisors is an integer number (62720086).

Almost surely, 2^125440171 is an apocalyptic number.

125440171 is a deficient number, since it is larger than the sum of its proper divisors (1).

125440171 is an equidigital number, since it uses as much as digits as its factorization.

125440171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 125440171 is about 11200.0076339260. The cubic root of 125440171 is about 500.5862071205.

Adding to 125440171 its reverse (171044521), we get a palindrome (296484692).

The spelling of 125440171 in words is "one hundred twenty-five million, four hundred forty thousand, one hundred seventy-one".