245391 has 8 divisors (see below), whose sum is σ = 329904. Its totient is φ = 162240.

The previous prime is 245389. The next prime is 245407. The reversal of 245391 is 193542.

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

It is not a de Polignac number, because 245391 - 2¹ = 245389 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245321) 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 7 ways as a sum of consecutive naturals, for example, 211 + ... + 731.

It is an arithmetic number, because the mean of its divisors is an integer number (41238).

2²⁴⁵³⁹¹ is an apocalyptic number.

245391 is a deficient number, since it is larger than the sum of its proper divisors (84513).

245391 is a wasteful number, since it uses less digits than its factorization.

245391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681.

The product of its digits is 1080, while the sum is 24.

The square root of 245391 is about 495.3695590163. The cubic root of 245391 is about 62.6065170295.

It can be divided in two parts, 245 and 391, that added together give a palindrome (636).

The spelling of 245391 in words is "two hundred forty-five thousand, three hundred ninety-one".