245045 has 4 divisors (see below), whose sum is σ = 294060. Its totient is φ = 196032.

The previous prime is 245039. The next prime is 245071. The reversal of 245045 is 540542.

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: 540542 = 2 ⋅270271.

It can be written as a sum of positive squares in 2 ways, for example, as 27889 + 217156 = 167^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 245045 - 2⁴ = 245029 is a prime.

It is a nialpdrome in base 12 and base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24500 + ... + 24509.

It is an arithmetic number, because the mean of its divisors is an integer number (73515).

2²⁴⁵⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

245045 is a deficient number, since it is larger than the sum of its proper divisors (49015).

245045 is an equidigital number, since it uses as much as digits as its factorization.

245045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49014.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 245045 is about 495.0202016080. The cubic root of 245045 is about 62.5770782374.

Subtracting from 245045 its sum of digits (20), we obtain a square (245025 = 495²).

Adding to 245045 its reverse (540542), we get a palindrome (785587).

The spelling of 245045 in words is "two hundred forty-five thousand, forty-five".