89421 has 8 divisors (see below), whose sum is σ = 122304. Its totient is φ = 58080.

The previous prime is 89417. The next prime is 89431. The reversal of 89421 is 12498.

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

It is not a de Polignac number, because 89421 - 2² = 89417 is a prime.

It is a super-2 number, since 2×89421² = 15992230482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

89421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 89391 and 89400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89431) 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, 241 + ... + 486.

It is an arithmetic number, because the mean of its divisors is an integer number (15288).

2⁸⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

89421 is a deficient number, since it is larger than the sum of its proper divisors (32883).

89421 is a wasteful number, since it uses less digits than its factorization.

89421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771.

The product of its digits is 576, while the sum is 24.

The square root of 89421 is about 299.0334429458. The cubic root of 89421 is about 44.7177394070.

The spelling of 89421 in words is "eighty-nine thousand, four hundred twenty-one".