245873 has 4 divisors (see below), whose sum is σ = 249408. Its totient is φ = 242340.

The previous prime is 245863. The next prime is 245881. The reversal of 245873 is 378542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 378542 = 2 ⋅189271.

It is a cyclic number.

It is not a de Polignac number, because 245873 - 2¹⁶ = 180337 is a prime.

It is a d-powerful number, because it can be written as 2³ + 4⁸ + 8 + 5⁵ + 7² + 3¹¹ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245863) 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, 1661 + ... + 1802.

It is an arithmetic number, because the mean of its divisors is an integer number (62352).

2²⁴⁵⁸⁷³ is an apocalyptic number.

It is an amenable number.

245873 is a deficient number, since it is larger than the sum of its proper divisors (3535).

245873 is an equidigital number, since it uses as much as digits as its factorization.

245873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3534.

The product of its digits is 6720, while the sum is 29.

The square root of 245873 is about 495.8558258204. The cubic root of 245873 is about 62.6474810490.

Multiplying 245873 by its sum of digits (29), we get a palindrome (7130317).

The spelling of 245873 in words is "two hundred forty-five thousand, eight hundred seventy-three".