242621329 has 2 divisors, whose sum is σ = 242621330. Its totient is φ = 242621328.

The previous prime is 242621293. The next prime is 242621377. The reversal of 242621329 is 923126242.

Together with previous prime (242621293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237868929 + 4752400 = 15423^2 + 2180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242621329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242621329.

It is not a weakly prime, because it can be changed into another prime (242621429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121310664 + 121310665.

It is an arithmetic number, because the mean of its divisors is an integer number (121310665).

Almost surely, 2^242621329 is an apocalyptic number.

It is an amenable number.

242621329 is a deficient number, since it is larger than the sum of its proper divisors (1).

242621329 is an equidigital number, since it uses as much as digits as its factorization.

242621329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 242621329 is about 15576.3066546598. The cubic root of 242621329 is about 623.7008354254.

It can be divided in two parts, 2426213 and 29, that added together give a palindrome (2426242).

The spelling of 242621329 in words is "two hundred forty-two million, six hundred twenty-one thousand, three hundred twenty-nine".