243421425 has 36 divisors (see below), whose sum is σ = 469538524. Its totient is φ = 119836800.

The previous prime is 243421417. The next prime is 243421481. The reversal of 243421425 is 524124342.

It can be written as a sum of positive squares in 6 ways, for example, as 28740321 + 214681104 = 5361^2 + 14652^2 .

It is not a de Polignac number, because 243421425 - 2³ = 243421417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38686 + ... + 44535.

Almost surely, 2^243421425 is an apocalyptic number.

243421425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243421425 is a deficient number, since it is larger than the sum of its proper divisors (226117099).

243421425 is a wasteful number, since it uses less digits than its factorization.

243421425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83250 (or 83242 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 243421425 is about 15601.9686257857. The cubic root of 243421425 is about 624.3856790401.

Adding to 243421425 its reverse (524124342), we get a palindrome (767545767).

The spelling of 243421425 in words is "two hundred forty-three million, four hundred twenty-one thousand, four hundred twenty-five".