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240421 is a prime number
BaseRepresentation
bin111010101100100101
3110012210111
4322230211
530143141
65053021
72020636
oct725445
9405714
10240421
111546a5
12b7171
138557c
146388d
154b381
hex3ab25

240421 has 2 divisors, whose sum is σ = 240422. Its totient is φ = 240420.

The previous prime is 240379. The next prime is 240433. The reversal of 240421 is 124042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236196 + 4225 = 486^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 240421 - 211 = 238373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120210 + 120211.

It is an arithmetic number, because the mean of its divisors is an integer number (120211).

2240421 is an apocalyptic number.

It is an amenable number.

240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

240421 is an equidigital number, since it uses as much as digits as its factorization.

240421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 240421 is about 490.3274416143. The cubic root of 240421 is about 62.1809662504.

Adding to 240421 its reverse (124042), we get a palindrome (364463).

The spelling of 240421 in words is "two hundred forty thousand, four hundred twenty-one", and thus it is an iban number.