108432421 has 8 divisors (see below), whose sum is σ = 112825080. Its totient is φ = 104083392.

The previous prime is 108432391. The next prime is 108432433. The reversal of 108432421 is 124234801.

It can be written as a sum of positive squares in 4 ways, for example, as 79121025 + 29311396 = 8895^2 + 5414^2 .

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 108432421 - 2¹⁹ = 107908133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108432461) 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 7 ways as a sum of consecutive naturals, for example, 5790 + ... + 15823.

It is an arithmetic number, because the mean of its divisors is an integer number (14103135).

Almost surely, 2^108432421 is an apocalyptic number.

It is an amenable number.

108432421 is a deficient number, since it is larger than the sum of its proper divisors (4392659).

108432421 is a wasteful number, since it uses less digits than its factorization.

108432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21815.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 108432421 is about 10413.0889269227. The cubic root of 108432421 is about 476.8550484207.

The spelling of 108432421 in words is "one hundred eight million, four hundred thirty-two thousand, four hundred twenty-one".