118144821 has 8 divisors (see below), whose sum is σ = 161368704. Its totient is φ = 76842080.

The previous prime is 118144801. The next prime is 118144837. The reversal of 118144821 is 128441811.

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 118144821 - 2¹⁰ = 118143797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118144801) 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, 480141 + ... + 480386.

It is an arithmetic number, because the mean of its divisors is an integer number (20171088).

Almost surely, 2^118144821 is an apocalyptic number.

It is an amenable number.

118144821 is a deficient number, since it is larger than the sum of its proper divisors (43223883).

118144821 is an equidigital number, since it uses as much as digits as its factorization.

118144821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960571.

The product of its digits is 2048, while the sum is 30.

The square root of 118144821 is about 10869.4443740239. Note that the first 3 decimals coincide. The cubic root of 118144821 is about 490.6873887206.

The spelling of 118144821 in words is "one hundred eighteen million, one hundred forty-four thousand, eight hundred twenty-one".