242181 has 12 divisors (see below), whose sum is σ = 355680. Its totient is φ = 158760.

The previous prime is 242173. The next prime is 242197. The reversal of 242181 is 181242.

It is not a de Polignac number, because 242181 - 2³ = 242173 is a prime.

It is a super-2 number, since 2×242181² = 117303273522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242101) 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, 450 + ... + 828.

It is an arithmetic number, because the mean of its divisors is an integer number (29640).

2²⁴²¹⁸¹ is an apocalyptic number.

It is an amenable number.

242181 is a deficient number, since it is larger than the sum of its proper divisors (113499).

242181 is a wasteful number, since it uses less digits than its factorization.

242181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 453 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 242181 is about 492.1188880748. The cubic root of 242181 is about 62.3323292532.

The spelling of 242181 in words is "two hundred forty-two thousand, one hundred eighty-one".