243462421 has 2 divisors, whose sum is σ = 243462422. Its totient is φ = 243462420.

The previous prime is 243462413. The next prime is 243462449. The reversal of 243462421 is 124264342.

It is an a-pointer prime, because the next prime (243462449) can be obtained adding 243462421 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233784100 + 9678321 = 15290^2 + 3111^2 .

It is a cyclic number.

It is not a de Polignac number, because 243462421 - 2³ = 243462413 is a prime.

It is a super-3 number, since 3×243462421³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243462421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243462481) 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, 121731210 + 121731211.

It is an arithmetic number, because the mean of its divisors is an integer number (121731211).

Almost surely, 2^243462421 is an apocalyptic number.

It is an amenable number.

243462421 is a deficient number, since it is larger than the sum of its proper divisors (1).

243462421 is an equidigital number, since it uses as much as digits as its factorization.

243462421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 28.

The square root of 243462421 is about 15603.2823790381. The cubic root of 243462421 is about 624.4207291984.

The spelling of 243462421 in words is "two hundred forty-three million, four hundred sixty-two thousand, four hundred twenty-one".