243145025 has 6 divisors (see below), whose sum is σ = 301499862. Its totient is φ = 194516000.

The previous prime is 243145009. The next prime is 243145027. The reversal of 243145025 is 520541342.

It is a happy number.

243145025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3297856 + 239847169 = 1816^2 + 15487^2 .

It is not a de Polignac number, because 243145025 - 2⁴ = 243145009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243144985 and 243145003.

It is not an unprimeable number, because it can be changed into a prime (243145027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4862876 + ... + 4862925.

It is an arithmetic number, because the mean of its divisors is an integer number (50249977).

Almost surely, 2^243145025 is an apocalyptic number.

243145025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243145025 is a deficient number, since it is larger than the sum of its proper divisors (58354837).

243145025 is an equidigital number, since it uses as much as digits as its factorization.

243145025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9725811 (or 9725806 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 243145025 is about 15593.1082533278. The cubic root of 243145025 is about 624.1492638556.

Adding to 243145025 its reverse (520541342), we get a palindrome (763686367).

The spelling of 243145025 in words is "two hundred forty-three million, one hundred forty-five thousand, twenty-five".