421473 has 16 divisors (see below), whose sum is σ = 616896. Its totient is φ = 254400.

The previous prime is 421471. The next prime is 421483. The reversal of 421473 is 374124.

It is not a de Polignac number, because 421473 - 2¹ = 421471 is a prime.

It is an Ulam number.

Its product of digits (672) is a multiple of the sum of its prime divisors (224).

It is not an unprimeable number, because it can be changed into a prime (421471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3886 + ... + 3992.

It is an arithmetic number, because the mean of its divisors is an integer number (38556).

2⁴²¹⁴⁷³ is an apocalyptic number.

It is an amenable number.

421473 is a deficient number, since it is larger than the sum of its proper divisors (195423).

421473 is a wasteful number, since it uses less digits than its factorization.

421473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its digits is 672, while the sum is 21.

The square root of 421473 is about 649.2095193387. The cubic root of 421473 is about 74.9761702071.

Adding to 421473 its reverse (374124), we get a palindrome (795597).

The spelling of 421473 in words is "four hundred twenty-one thousand, four hundred seventy-three", and thus it is an iban number.