242173129 has 4 divisors (see below), whose sum is σ = 264188880. Its totient is φ = 220157380.

The previous prime is 242173097. The next prime is 242173133. The reversal of 242173129 is 921371242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242173129 - 2⁵ = 242173097 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 242173129.

It is not an unprimeable number, because it can be changed into a prime (242173159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11007859 + ... + 11007880.

It is an arithmetic number, because the mean of its divisors is an integer number (66047220).

Almost surely, 2^242173129 is an apocalyptic number.

It is an amenable number.

242173129 is a deficient number, since it is larger than the sum of its proper divisors (22015751).

242173129 is a wasteful number, since it uses less digits than its factorization.

242173129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22015750.

The product of its digits is 6048, while the sum is 31.

The square root of 242173129 is about 15561.9127680372. The cubic root of 242173129 is about 623.3165396895.

It can be divided in two parts, 242 and 173129, that added together give a palindrome (173371).

The spelling of 242173129 in words is "two hundred forty-two million, one hundred seventy-three thousand, one hundred twenty-nine".