109421 has 8 divisors (see below), whose sum is σ = 124320. Its totient is φ = 95472.

The previous prime is 109397. The next prime is 109423. The reversal of 109421 is 124901.

It is a happy number.

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

It is not a de Polignac number, because 109421 - 2⁶ = 109357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 109421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26 + ... + 468.

It is an arithmetic number, because the mean of its divisors is an integer number (15540).

2¹⁰⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

109421 is a deficient number, since it is larger than the sum of its proper divisors (14899).

109421 is a wasteful number, since it uses less digits than its factorization.

109421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 109421 is about 330.7884520354. The cubic root of 109421 is about 47.8299829980.

The spelling of 109421 in words is "one hundred nine thousand, four hundred twenty-one".