243125321245 has 16 divisors (see below), whose sum is σ = 308957202288. Its totient is φ = 183032381440.

The previous prime is 243125321237. The next prime is 243125321251. The reversal of 243125321245 is 542123521342.

It can be written as a sum of positive squares in 8 ways, for example, as 18272010276 + 224853310969 = 135174^2 + 474187^2 .

It is not a de Polignac number, because 243125321245 - 2³ = 243125321237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243125321245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388065 + ... + 798025.

It is an arithmetic number, because the mean of its divisors is an integer number (19309825143).

Almost surely, 2^243125321245 is an apocalyptic number.

It is an amenable number.

243125321245 is a deficient number, since it is larger than the sum of its proper divisors (65831881043).

243125321245 is a wasteful number, since it uses less digits than its factorization.

243125321245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416960.

The product of its digits is 57600, while the sum is 34.

Adding to 243125321245 its reverse (542123521342), we get a palindrome (785248842587).

The spelling of 243125321245 in words is "two hundred forty-three billion, one hundred twenty-five million, three hundred twenty-one thousand, two hundred forty-five".