242851 has 4 divisors (see below), whose sum is σ = 277552. Its totient is φ = 208152.

The previous prime is 242819. The next prime is 242863. The reversal of 242851 is 158242.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 242851 - 2⁵ = 242819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242551) 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, 17340 + ... + 17353.

It is an arithmetic number, because the mean of its divisors is an integer number (69388).

2²⁴²⁸⁵¹ is an apocalyptic number.

242851 is a deficient number, since it is larger than the sum of its proper divisors (34701).

242851 is an equidigital number, since it uses as much as digits as its factorization.

242851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34700.

The product of its digits is 640, while the sum is 22.

The square root of 242851 is about 492.7991477265. The cubic root of 242851 is about 62.3897576604.

The spelling of 242851 in words is "two hundred forty-two thousand, eight hundred fifty-one".