106421 has 8 divisors (see below), whose sum is σ = 127104. Its totient is φ = 87120.

The previous prime is 106417. The next prime is 106427. The reversal of 106421 is 124601.

106421 is nontrivially palindromic in base 13.

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 106421 - 2² = 106417 is a prime.

It is a super-2 number, since 2×106421² = 22650858482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 106396 and 106405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106427) 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, 170 + ... + 491.

It is an arithmetic number, because the mean of its divisors is an integer number (15888).

2¹⁰⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

106421 is a deficient number, since it is larger than the sum of its proper divisors (20683).

106421 is an equidigital number, since it uses as much as digits as its factorization.

106421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 106421 is about 326.2223168332. Note that the first 3 decimals coincide. The cubic root of 106421 is about 47.3888073177.

The spelling of 106421 in words is "one hundred six thousand, four hundred twenty-one".