421672 has 8 divisors (see below), whose sum is σ = 790650. Its totient is φ = 210832.

The previous prime is 421661. The next prime is 421691. The reversal of 421672 is 276124.

It can be written as a sum of positive squares in only one way, i.e., 417316 + 4356 = 646^2 + 66^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 11.

It is an unprimeable number.

421672 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, 26347 + ... + 26362.

2⁴²¹⁶⁷² is an apocalyptic number.

It is an amenable number.

421672 is a deficient number, since it is larger than the sum of its proper divisors (368978).

421672 is a wasteful number, since it uses less digits than its factorization.

421672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52715 (or 52711 counting only the distinct ones).

The product of its digits is 672, while the sum is 22.

The square root of 421672 is about 649.3627645623. The cubic root of 421672 is about 74.9879684404.

Adding to 421672 its reverse (276124), we get a palindrome (697796).

The spelling of 421672 in words is "four hundred twenty-one thousand, six hundred seventy-two".