125315191 has 4 divisors (see below), whose sum is σ = 125439912. Its totient is φ = 125190472.

The previous prime is 125315159. The next prime is 125315219. The reversal of 125315191 is 191513521.

125315191 is nontrivially palindromic in base 16.

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

It is a cyclic number.

It is not a de Polignac number, because 125315191 - 2⁵ = 125315159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125315101) 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, 60841 + ... + 62866.

It is an arithmetic number, because the mean of its divisors is an integer number (31359978).

Almost surely, 2^125315191 is an apocalyptic number.

125315191 is a deficient number, since it is larger than the sum of its proper divisors (124721).

125315191 is a wasteful number, since it uses less digits than its factorization.

125315191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124720.

The product of its digits is 1350, while the sum is 28.

The square root of 125315191 is about 11194.4267830023. The cubic root of 125315191 is about 500.4199019327.

The spelling of 125315191 in words is "one hundred twenty-five million, three hundred fifteen thousand, one hundred ninety-one".