243121241045 has 8 divisors (see below), whose sum is σ = 291749076024. Its totient is φ = 194494601664.

The previous prime is 243121241039. The next prime is 243121241053. The reversal of 243121241045 is 540142121342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 71268709444 + 171852531601 = 266962^2 + 414551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243121241045 - 2²⁴ = 243104463829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243121240999 and 243121241017.

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 7 ways as a sum of consecutive naturals, for example, 235247 + ... + 735923.

It is an arithmetic number, because the mean of its divisors is an integer number (36468634503).

Almost surely, 2^243121241045 is an apocalyptic number.

It is an amenable number.

243121241045 is a deficient number, since it is larger than the sum of its proper divisors (48627834979).

243121241045 is an equidigital number, since it uses as much as digits as its factorization.

243121241045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597799.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 243121241045 its reverse (540142121342), we get a palindrome (783263362387).

The spelling of 243121241045 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-one thousand, forty-five".