243461 has 2 divisors, whose sum is σ = 243462. Its totient is φ = 243460.

The previous prime is 243437. The next prime is 243469. The reversal of 243461 is 164342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231361 + 12100 = 481^2 + 110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243461 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243461.

It is not a weakly prime, because it can be changed into another prime (243469) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121730 + 121731.

It is an arithmetic number, because the mean of its divisors is an integer number (121731).

2²⁴³⁴⁶¹ is an apocalyptic number.

It is an amenable number.

243461 is a deficient number, since it is larger than the sum of its proper divisors (1).

243461 is an equidigital number, since it uses as much as digits as its factorization.

243461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 243461 is about 493.4176729709. The cubic root of 243461 is about 62.4419514359.

The spelling of 243461 in words is "two hundred forty-three thousand, four hundred sixty-one".