245191 has 4 divisors (see below), whose sum is σ = 259632. Its totient is φ = 230752.

The previous prime is 245183. The next prime is 245209. The reversal of 245191 is 191542.

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 245191 - 2³ = 245183 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7195 + ... + 7228.

It is an arithmetic number, because the mean of its divisors is an integer number (64908).

2²⁴⁵¹⁹¹ is an apocalyptic number.

245191 is a deficient number, since it is larger than the sum of its proper divisors (14441).

245191 is a wasteful number, since it uses less digits than its factorization.

245191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14440.

The product of its digits is 360, while the sum is 22.

The square root of 245191 is about 495.1676483778. The cubic root of 245191 is about 62.5895037640.

The spelling of 245191 in words is "two hundred forty-five thousand, one hundred ninety-one".