125191 has 8 divisors (see below), whose sum is σ = 144000. Its totient is φ = 107640.

The previous prime is 125183. The next prime is 125197. The reversal of 125191 is 191521.

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

It is a cyclic number.

It is not a de Polignac number, because 125191 - 2³ = 125183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125197) 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, 91 + ... + 508.

It is an arithmetic number, because the mean of its divisors is an integer number (18000).

2¹²⁵¹⁹¹ is an apocalyptic number.

125191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125191 is a deficient number, since it is larger than the sum of its proper divisors (18809).

125191 is a wasteful number, since it uses less digits than its factorization.

125191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629.

The product of its digits is 90, while the sum is 19.

The square root of 125191 is about 353.8234022786. The cubic root of 125191 is about 50.0254537066.

The spelling of 125191 in words is "one hundred twenty-five thousand, one hundred ninety-one".