245775 has 24 divisors (see below), whose sum is σ = 424080. Its totient is φ = 125440.

The previous prime is 245771. The next prime is 245783. The reversal of 245775 is 577542.

245775 is nontrivially palindromic in base 2 and base 4.

It is not a de Polignac number, because 245775 - 2² = 245771 is a prime.

It is a zygodrome in base 2 and base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2119 + ... + 2231.

It is an arithmetic number, because the mean of its divisors is an integer number (17670).

2²⁴⁵⁷⁷⁵ is an apocalyptic number.

245775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

245775 is a deficient number, since it is larger than the sum of its proper divisors (178305).

245775 is a wasteful number, since it uses less digits than its factorization.

245775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 150 counting only the distinct ones).

The product of its digits is 9800, while the sum is 30.

The square root of 245775 is about 495.7569969249. The cubic root of 245775 is about 62.6391566038.

The spelling of 245775 in words is "two hundred forty-five thousand, seven hundred seventy-five".