243005725 has 12 divisors (see below), whose sum is σ = 317187040. Its totient is φ = 184172400.

The previous prime is 243005681. The next prime is 243005743. The reversal of 243005725 is 527500342.

It is not a de Polignac number, because 243005725 - 2²¹ = 240908573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243005693 and 243005702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255321 + ... + 256270.

Almost surely, 2^243005725 is an apocalyptic number.

243005725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243005725 is a deficient number, since it is larger than the sum of its proper divisors (74181315).

243005725 is a wasteful number, since it uses less digits than its factorization.

243005725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511620 (or 511615 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 243005725 is about 15588.6408964990. The cubic root of 243005725 is about 624.0300474861.

The spelling of 243005725 in words is "two hundred forty-three million, five thousand, seven hundred twenty-five".