118286421 has 32 divisors (see below), whose sum is σ = 181800960. Its totient is φ = 67737600.

The previous prime is 118286393. The next prime is 118286431. The reversal of 118286421 is 124682811.

It is not a de Polignac number, because 118286421 - 2²³ = 109897813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118286431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42645 + ... + 45333.

It is an arithmetic number, because the mean of its divisors is an integer number (5681280).

Almost surely, 2^118286421 is an apocalyptic number.

118286421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118286421 is a deficient number, since it is larger than the sum of its proper divisors (63514539).

118286421 is a wasteful number, since it uses less digits than its factorization.

118286421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777.

The product of its digits is 6144, while the sum is 33.

The square root of 118286421 is about 10875.9560959026. The cubic root of 118286421 is about 490.8833448182.

The spelling of 118286421 in words is "one hundred eighteen million, two hundred eighty-six thousand, four hundred twenty-one".