421712 has 10 divisors (see below), whose sum is σ = 817098. Its totient is φ = 210848.

The previous prime is 421711. The next prime is 421717. The reversal of 421712 is 217124.

It can be written as a sum of positive squares in only one way, i.e., 341056 + 80656 = 584^2 + 284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13163 + ... + 13194.

2⁴²¹⁷¹² is an apocalyptic number.

It is an amenable number.

421712 is a deficient number, since it is larger than the sum of its proper divisors (395386).

421712 is a wasteful number, since it uses less digits than its factorization.

421712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26365 (or 26359 counting only the distinct ones).

The product of its digits is 112, while the sum is 17.

The square root of 421712 is about 649.3935632573. The cubic root of 421712 is about 74.9903394965.

Adding to 421712 its reverse (217124), we get a palindrome (638836).

The spelling of 421712 in words is "four hundred twenty-one thousand, seven hundred twelve", and thus it is an iban number.