243123725 has 24 divisors (see below), whose sum is σ = 326536392. Its totient is φ = 178502400.

The previous prime is 243123721. The next prime is 243123761. The reversal of 243123725 is 527321342.

It can be written as a sum of positive squares in 12 ways, for example, as 159693769 + 83429956 = 12637^2 + 9134^2 .

It is not a de Polignac number, because 243123725 - 2² = 243123721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243123721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56759 + ... + 60891.

It is an arithmetic number, because the mean of its divisors is an integer number (13605683).

Almost surely, 2^243123725 is an apocalyptic number.

243123725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243123725 is a deficient number, since it is larger than the sum of its proper divisors (83412667).

243123725 is a wasteful number, since it uses less digits than its factorization.

243123725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337 (or 4332 counting only the distinct ones).

The product of its digits is 10080, while the sum is 29.

The square root of 243123725 is about 15592.4252443294. The cubic root of 243123725 is about 624.1310377406.

The spelling of 243123725 in words is "two hundred forty-three million, one hundred twenty-three thousand, seven hundred twenty-five".