421004 has 6 divisors (see below), whose sum is σ = 736764. Its totient is φ = 210500.

The previous prime is 420997. The next prime is 421009. The reversal of 421004 is 400124.

421004 is nontrivially palindromic in base 14.

It is not an unprimeable number, because it can be changed into a prime (421009) by changing a digit.

421004 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52622 + ... + 52629.

It is an arithmetic number, because the mean of its divisors is an integer number (122794).

2⁴²¹⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

421004 is a deficient number, since it is larger than the sum of its proper divisors (315760).

421004 is a wasteful number, since it uses less digits than its factorization.

421004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105255 (or 105253 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 421004 is about 648.8482102927. The cubic root of 421004 is about 74.9483496232.

Adding to 421004 its reverse (400124), we get a palindrome (821128).

The spelling of 421004 in words is "four hundred twenty-one thousand, four", and thus it is an iban number.