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242081 = 734583
BaseRepresentation
bin111011000110100001
3110022001222
4323012201
530221311
65104425
72025530
oct730641
9408058
10242081
11155974
12b8115
1386258
1464317
154badb
hex3b1a1

242081 has 4 divisors (see below), whose sum is σ = 276672. Its totient is φ = 207492.

The previous prime is 242069. The next prime is 242083. The reversal of 242081 is 180242.

242081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 180242 = 290121.

It is a cyclic number.

It is not a de Polignac number, because 242081 - 214 = 225697 is a prime.

It is a super-2 number, since 2×2420812 = 117206421122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242083) 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, 17285 + ... + 17298.

It is an arithmetic number, because the mean of its divisors is an integer number (69168).

2242081 is an apocalyptic number.

It is an amenable number.

242081 is a deficient number, since it is larger than the sum of its proper divisors (34591).

242081 is an equidigital number, since it uses as much as digits as its factorization.

242081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34590.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 242081 is about 492.0172761194. The cubic root of 242081 is about 62.3237487686.

Subtracting from 242081 its sum of digits (17), we obtain a square (242064 = 4922).

The spelling of 242081 in words is "two hundred forty-two thousand, eighty-one".

Divisors: 1 7 34583 242081