245505 has 16 divisors (see below), whose sum is σ = 423360. Its totient is φ = 120768.

The previous prime is 245501. The next prime is 245513. The reversal of 245505 is 505542.

It is not a de Polignac number, because 245505 - 2² = 245501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435 + ... + 824.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2²⁴⁵⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

245505 is a deficient number, since it is larger than the sum of its proper divisors (177855).

245505 is a wasteful number, since it uses less digits than its factorization.

245505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 245505 is about 495.4846112646. The cubic root of 245505 is about 62.6162104548.

The spelling of 245505 in words is "two hundred forty-five thousand, five hundred five".