243121076 has 12 divisors (see below), whose sum is σ = 464140320. Its totient is φ = 110509560.

The previous prime is 243121057. The next prime is 243121079. The reversal of 243121076 is 670121342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2762696 + ... + 2762783.

It is an arithmetic number, because the mean of its divisors is an integer number (38678360).

Almost surely, 2^243121076 is an apocalyptic number.

It is an amenable number.

243121076 is a deficient number, since it is larger than the sum of its proper divisors (221019244).

243121076 is a wasteful number, since it uses less digits than its factorization.

243121076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525494 (or 5525492 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 243121076 is about 15592.3402990058. The cubic root of 243121076 is about 624.1287709536.

The spelling of 243121076 in words is "two hundred forty-three million, one hundred twenty-one thousand, seventy-six".