245161 has 4 divisors (see below), whose sum is σ = 280192. Its totient is φ = 210132.

The previous prime is 245149. The next prime is 245171. The reversal of 245161 is 161542.

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.

It is a cyclic number.

It is not a de Polignac number, because 245161 - 2⁵ = 245129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245131) 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, 17505 + ... + 17518.

It is an arithmetic number, because the mean of its divisors is an integer number (70048).

2²⁴⁵¹⁶¹ is an apocalyptic number.

It is an amenable number.

245161 is a deficient number, since it is larger than the sum of its proper divisors (35031).

245161 is an equidigital number, since it uses as much as digits as its factorization.

245161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35030.

The product of its digits is 240, while the sum is 19.

The square root of 245161 is about 495.1373546805. The cubic root of 245161 is about 62.5869509763.

It can be divided in two parts, 245 and 161, that added together give a triangular number (406 = T₂₈).

The spelling of 245161 in words is "two hundred forty-five thousand, one hundred sixty-one".