842518121 has 8 divisors (see below), whose sum is σ = 917443200. Its totient is φ = 770651280.

The previous prime is 842518097. The next prime is 842518123. The reversal of 842518121 is 121815248.

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 842518121 - 2⁶ = 842518057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842518123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763985 + ... + 765086.

It is an arithmetic number, because the mean of its divisors is an integer number (114680400).

Almost surely, 2^842518121 is an apocalyptic number.

It is an amenable number.

842518121 is a deficient number, since it is larger than the sum of its proper divisors (74925079).

842518121 is a wasteful number, since it uses less digits than its factorization.

842518121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529119.

The product of its digits is 5120, while the sum is 32.

The square root of 842518121 is about 29026.1626985036. The cubic root of 842518121 is about 944.4806907576.

The spelling of 842518121 in words is "eight hundred forty-two million, five hundred eighteen thousand, one hundred twenty-one".