125197191 has 32 divisors (see below), whose sum is σ = 212958720. Its totient is φ = 71209152.

The previous prime is 125197181. The next prime is 125197199. The reversal of 125197191 is 191791521.

It is not a de Polignac number, because 125197191 - 2⁷ = 125197063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125197199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42616 + ... + 45458.

It is an arithmetic number, because the mean of its divisors is an integer number (6654960).

Almost surely, 2^125197191 is an apocalyptic number.

125197191 is a deficient number, since it is larger than the sum of its proper divisors (87761529).

125197191 is a wasteful number, since it uses less digits than its factorization.

125197191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3092 (or 3086 counting only the distinct ones).

The product of its digits is 5670, while the sum is 36.

The square root of 125197191 is about 11189.1550619339. The cubic root of 125197191 is about 500.2627831991.

Subtracting from 125197191 its product of digits (5670), we obtain a palindrome (125191521).

The spelling of 125197191 in words is "one hundred twenty-five million, one hundred ninety-seven thousand, one hundred ninety-one".