243123025 has 6 divisors (see below), whose sum is σ = 301472582. Its totient is φ = 194498400.

The previous prime is 243123017. The next prime is 243123061. The reversal of 243123025 is 520321342.

It can be written as a sum of positive squares in 3 ways, for example, as 63107136 + 180015889 = 7944^2 + 13417^2 .

It is not a de Polignac number, because 243123025 - 2³ = 243123017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243122987 and 243123005.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4862436 + ... + 4862485.

Almost surely, 2^243123025 is an apocalyptic number.

243123025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243123025 is a deficient number, since it is larger than the sum of its proper divisors (58349557).

243123025 is an equidigital number, since it uses as much as digits as its factorization.

243123025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9724931 (or 9724926 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 243123025 is about 15592.4027975165. The cubic root of 243123025 is about 624.1304387422.

Adding to 243123025 its reverse (520321342), we get a palindrome (763444367).

The spelling of 243123025 in words is "two hundred forty-three million, one hundred twenty-three thousand, twenty-five".