245871 has 12 divisors (see below), whose sum is σ = 376272. Its totient is φ = 154176.

The previous prime is 245863. The next prime is 245881. The reversal of 245871 is 178542.

It is not a de Polignac number, because 245871 - 2³ = 245863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (31356).

2²⁴⁵⁸⁷¹ is an apocalyptic number.

245871 is a deficient number, since it is larger than the sum of its proper divisors (130401).

245871 is a wasteful number, since it uses less digits than its factorization.

245871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1627 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 245871 is about 495.8538091010. The cubic root of 245871 is about 62.6473111845.

The spelling of 245871 in words is "two hundred forty-five thousand, eight hundred seventy-one".