427021 has 8 divisors (see below), whose sum is σ = 497664. Its totient is φ = 358800.

The previous prime is 427013. The next prime is 427039. The reversal of 427021 is 120724.

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 427021 - 2³ = 427013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 426986 and 427004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (62208).

2⁴²⁷⁰²¹ is an apocalyptic number.

It is an amenable number.

427021 is a deficient number, since it is larger than the sum of its proper divisors (70643).

427021 is a wasteful number, since it uses less digits than its factorization.

427021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 427021 is about 653.4684384115. The cubic root of 427021 is about 75.3037165712.

Adding to 427021 its reverse (120724), we get a palindrome (547745).

The spelling of 427021 in words is "four hundred twenty-seven thousand, twenty-one", and thus it is an iban number.