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242591 is a prime number
BaseRepresentation
bin111011001110011111
3110022202212
4323032133
530230331
65111035
72030156
oct731637
9408685
10242591
11156298
12b847b
138655b
146459d
154bd2b
hex3b39f

242591 has 2 divisors, whose sum is σ = 242592. Its totient is φ = 242590.

The previous prime is 242551. The next prime is 242603. The reversal of 242591 is 195242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242591 - 210 = 241567 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121295 + 121296.

It is an arithmetic number, because the mean of its divisors is an integer number (121296).

2242591 is an apocalyptic number.

242591 is a deficient number, since it is larger than the sum of its proper divisors (1).

242591 is an equidigital number, since it uses as much as digits as its factorization.

242591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 242591 is about 492.5352779243. The cubic root of 242591 is about 62.3674845665.

The spelling of 242591 in words is "two hundred forty-two thousand, five hundred ninety-one".