118280421 has 24 divisors (see below), whose sum is σ = 203748480. Its totient is φ = 64649376.

The previous prime is 118280419. The next prime is 118280429. The reversal of 118280421 is 124082811.

It is not a de Polignac number, because 118280421 - 2¹ = 118280419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118280429) 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 23 ways as a sum of consecutive naturals, for example, 39366 + ... + 42263.

It is an arithmetic number, because the mean of its divisors is an integer number (8489520).

Almost surely, 2^118280421 is an apocalyptic number.

It is an amenable number.

118280421 is a deficient number, since it is larger than the sum of its proper divisors (85468059).

118280421 is a wasteful number, since it uses less digits than its factorization.

118280421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81665 (or 81662 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 118280421 is about 10875.6802545864. The cubic root of 118280421 is about 490.8750447675.

The spelling of 118280421 in words is "one hundred eighteen million, two hundred eighty thousand, four hundred twenty-one".