245923 has 4 divisors (see below), whose sum is σ = 253888. Its totient is φ = 237960.

The previous prime is 245911. The next prime is 245941. The reversal of 245923 is 329542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329542 = 2 ⋅164771.

It is a cyclic number.

It is not a de Polignac number, because 245923 - 2⁹ = 245411 is a prime.

It is a d-powerful number, because it can be written as 2 + 4⁸ + 9² + 5⁵ + 2⁵ + 3¹¹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245963) 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, 3936 + ... + 3997.

It is an arithmetic number, because the mean of its divisors is an integer number (63472).

2²⁴⁵⁹²³ is an apocalyptic number.

245923 is a deficient number, since it is larger than the sum of its proper divisors (7965).

245923 is an equidigital number, since it uses as much as digits as its factorization.

245923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7964.

The product of its digits is 2160, while the sum is 25.

The square root of 245923 is about 495.9062411384. The cubic root of 245923 is about 62.6517273629.

The spelling of 245923 in words is "two hundred forty-five thousand, nine hundred twenty-three".