234721 has 2 divisors, whose sum is σ = 234722. Its totient is φ = 234720.

The previous prime is 234713. The next prime is 234727. The reversal of 234721 is 127432.

234721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 18496 = 465^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 234721 - 2³ = 234713 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

234721 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (234727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117360 + 117361.

It is an arithmetic number, because the mean of its divisors is an integer number (117361).

2²³⁴⁷²¹ is an apocalyptic number.

It is an amenable number.

234721 is a deficient number, since it is larger than the sum of its proper divisors (1).

234721 is an equidigital number, since it uses as much as digits as its factorization.

234721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 19.

The square root of 234721 is about 484.4801337516. The cubic root of 234721 is about 61.6856268296.

The spelling of 234721 in words is "two hundred thirty-four thousand, seven hundred twenty-one".