421073 has 12 divisors (see below), whose sum is σ = 471552. Its totient is φ = 375360.

The previous prime is 421049. The next prime is 421079. The reversal of 421073 is 370124.

It is a happy number.

It is not a de Polignac number, because 421073 - 2⁶ = 421009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8936 + ... + 8982.

It is an arithmetic number, because the mean of its divisors is an integer number (39296).

2⁴²¹⁰⁷³ is an apocalyptic number.

It is an amenable number.

421073 is a deficient number, since it is larger than the sum of its proper divisors (50479).

421073 is a wasteful number, since it uses less digits than its factorization.

421073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 421073 is about 648.9013792557. The cubic root of 421073 is about 74.9524439260.

Adding to 421073 its reverse (370124), we get a palindrome (791197).

The spelling of 421073 in words is "four hundred twenty-one thousand, seventy-three", and thus it is an iban number.