118585821 has 8 divisors (see below), whose sum is σ = 166436320. Its totient is φ = 74896272.

The previous prime is 118585813. The next prime is 118585823. The reversal of 118585821 is 128585811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118585821 - 2³ = 118585813 is a prime.

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 118585821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118585823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040170 + ... + 1040283.

It is an arithmetic number, because the mean of its divisors is an integer number (20804540).

Almost surely, 2^118585821 is an apocalyptic number.

It is an amenable number.

118585821 is a deficient number, since it is larger than the sum of its proper divisors (47850499).

118585821 is a wasteful number, since it uses less digits than its factorization.

118585821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080475.

The product of its digits is 25600, while the sum is 39.

The square root of 118585821 is about 10889.7117041729. The cubic root of 118585821 is about 491.2971613975.

The spelling of 118585821 in words is "one hundred eighteen million, five hundred eighty-five thousand, eight hundred twenty-one".