243425401 has 2 divisors, whose sum is σ = 243425402. Its totient is φ = 243425400.

The previous prime is 243425389. The next prime is 243425411. The reversal of 243425401 is 104524342.

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., 151265401 + 92160000 = 12299^2 + 9600^2 .

It is a cyclic number.

It is not a de Polignac number, because 243425401 - 2¹⁷ = 243294329 is a prime.

It is not a weakly prime, because it can be changed into another prime (243425411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121712700 + 121712701.

It is an arithmetic number, because the mean of its divisors is an integer number (121712701).

Almost surely, 2^243425401 is an apocalyptic number.

It is an amenable number.

243425401 is a deficient number, since it is larger than the sum of its proper divisors (1).

243425401 is an equidigital number, since it uses as much as digits as its factorization.

243425401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 243425401 is about 15602.0960450832. The cubic root of 243425401 is about 624.3890785545.

Adding to 243425401 its reverse (104524342), we get a palindrome (347949743).

The spelling of 243425401 in words is "two hundred forty-three million, four hundred twenty-five thousand, four hundred one".