242617729 has 4 divisors (see below), whose sum is σ = 247195476. Its totient is φ = 238039984.

The previous prime is 242617703. The next prime is 242617733. The reversal of 242617729 is 927716242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61984129 + 180633600 = 7873^2 + 13440^2 .

It is a cyclic number.

It is not a de Polignac number, because 242617729 - 2¹⁹ = 242093441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242617691 and 242617700.

It is not an unprimeable number, because it can be changed into a prime (242617789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2288794 + ... + 2288899.

It is an arithmetic number, because the mean of its divisors is an integer number (61798869).

Almost surely, 2^242617729 is an apocalyptic number.

It is an amenable number.

242617729 is a deficient number, since it is larger than the sum of its proper divisors (4577747).

242617729 is an equidigital number, since it uses as much as digits as its factorization.

242617729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577746.

The product of its digits is 84672, while the sum is 40.

The square root of 242617729 is about 15576.1910941026. The cubic root of 242617729 is about 623.6977505989.

The spelling of 242617729 in words is "two hundred forty-two million, six hundred seventeen thousand, seven hundred twenty-nine".