245345 has 4 divisors (see below), whose sum is σ = 294420. Its totient is φ = 196272.

The previous prime is 245339. The next prime is 245383. The reversal of 245345 is 543542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543542 = 2 ⋅271771.

It can be written as a sum of positive squares in 2 ways, for example, as 30976 + 214369 = 176^2 + 463^2 .

It is a cyclic number.

It is not a de Polignac number, because 245345 - 2¹² = 241249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24530 + ... + 24539.

It is an arithmetic number, because the mean of its divisors is an integer number (73605).

2²⁴⁵³⁴⁵ is an apocalyptic number.

It is an amenable number.

245345 is a deficient number, since it is larger than the sum of its proper divisors (49075).

245345 is an equidigital number, since it uses as much as digits as its factorization.

245345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49074.

The product of its digits is 2400, while the sum is 23.

The square root of 245345 is about 495.3231268576. The cubic root of 245345 is about 62.6026047972.

Adding to 245345 its reverse (543542), we get a palindrome (788887).

The spelling of 245345 in words is "two hundred forty-five thousand, three hundred forty-five".