245855 has 4 divisors (see below), whose sum is σ = 295032. Its totient is φ = 196680.

The previous prime is 245851. The next prime is 245863. The reversal of 245855 is 558542.

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

It is not a de Polignac number, because 245855 - 2² = 245851 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245851) 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, 24581 + ... + 24590.

It is an arithmetic number, because the mean of its divisors is an integer number (73758).

2²⁴⁵⁸⁵⁵ is an apocalyptic number.

245855 is a deficient number, since it is larger than the sum of its proper divisors (49177).

245855 is an equidigital number, since it uses as much as digits as its factorization.

245855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49176.

The product of its digits is 8000, while the sum is 29.

The square root of 245855 is about 495.8376750510. The cubic root of 245855 is about 62.6459522351.

The spelling of 245855 in words is "two hundred forty-five thousand, eight hundred fifty-five".