191225 has 6 divisors (see below), whose sum is σ = 237150. Its totient is φ = 152960.

The previous prime is 191189. The next prime is 191227. The reversal of 191225 is 522191.

It can be written as a sum of positive squares in 3 ways, for example, as 256 + 190969 = 16^2 + 437^2 .

It is not a de Polignac number, because 191225 - 2⁶ = 191161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191197 and 191206.

It is not an unprimeable number, because it can be changed into a prime (191227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3800 + ... + 3849.

It is an arithmetic number, because the mean of its divisors is an integer number (39525).

2¹⁹¹²²⁵ is an apocalyptic number.

It is an amenable number.

191225 is a deficient number, since it is larger than the sum of its proper divisors (45925).

191225 is an equidigital number, since it uses as much as digits as its factorization.

191225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659 (or 7654 counting only the distinct ones).

The product of its digits is 180, while the sum is 20.

The square root of 191225 is about 437.2928080817. The cubic root of 191225 is about 57.6122570688.

The spelling of 191225 in words is "one hundred ninety-one thousand, two hundred twenty-five".