243026401 has 2 divisors, whose sum is σ = 243026402. Its totient is φ = 243026400.

The previous prime is 243026383. The next prime is 243026431. The reversal of 243026401 is 104620342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236390625 + 6635776 = 15375^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 243026401 - 2²⁷ = 108808673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243026431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121513200 + 121513201.

It is an arithmetic number, because the mean of its divisors is an integer number (121513201).

Almost surely, 2^243026401 is an apocalyptic number.

It is an amenable number.

243026401 is a deficient number, since it is larger than the sum of its proper divisors (1).

243026401 is an equidigital number, since it uses as much as digits as its factorization.

243026401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 243026401 is about 15589.3040575903. The cubic root of 243026401 is about 624.0477453947.

Adding to 243026401 its reverse (104620342), we get a palindrome (347646743).

It can be divided in two parts, 24302 and 6401, that added together give a palindrome (30703).

The spelling of 243026401 in words is "two hundred forty-three million, twenty-six thousand, four hundred one".