421072 has 10 divisors (see below), whose sum is σ = 815858. Its totient is φ = 210528.

The previous prime is 421049. The next prime is 421079. The reversal of 421072 is 270124.

It can be written as a sum of positive squares in only one way, i.e., 379456 + 41616 = 616^2 + 204^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 26317 = 421072 / (4 + 2 + 1 + 0 + 7 + 2).

It is a congruent 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 as a sum of consecutive naturals, namely, 13143 + ... + 13174.

2⁴²¹⁰⁷² is an apocalyptic number.

It is an amenable number.

421072 is a deficient number, since it is larger than the sum of its proper divisors (394786).

421072 is a wasteful number, since it uses less digits than its factorization.

421072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26325 (or 26319 counting only the distinct ones).

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

The square root of 421072 is about 648.9006087222. The cubic root of 421072 is about 74.9523845915.

Adding to 421072 its reverse (270124), we get a palindrome (691196).

The spelling of 421072 in words is "four hundred twenty-one thousand, seventy-two", and thus it is an iban number.