421017 has 4 divisors (see below), whose sum is σ = 561360. Its totient is φ = 280676.

The previous prime is 421009. The next prime is 421019. The reversal of 421017 is 710124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421017 - 2³ = 421009 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 420987 and 421005.

It is not an unprimeable number, because it can be changed into a prime (421019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70167 + ... + 70172.

It is an arithmetic number, because the mean of its divisors is an integer number (140340).

2⁴²¹⁰¹⁷ is an apocalyptic number.

It is an amenable number.

421017 is a deficient number, since it is larger than the sum of its proper divisors (140343).

421017 is a wasteful number, since it uses less digits than its factorization.

421017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140342.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 421017 is about 648.8582279666. The cubic root of 421017 is about 74.9491210478.

The spelling of 421017 in words is "four hundred twenty-one thousand, seventeen", and thus it is an iban number.