421726 has 16 divisors (see below), whose sum is σ = 670320. Its totient is φ = 198720.

The previous prime is 421717. The next prime is 421727. The reversal of 421726 is 627124.

It is a junction number, because it is equal to n+sod(n) for n = 421697 and 421706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421727) by changing a digit.

421726 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2965 + ... + 3103.

It is an arithmetic number, because the mean of its divisors is an integer number (41895).

2⁴²¹⁷²⁶ is an apocalyptic number.

421726 is a deficient number, since it is larger than the sum of its proper divisors (248594).

421726 is a wasteful number, since it uses less digits than its factorization.

421726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

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

The square root of 421726 is about 649.4043424555. The cubic root of 421726 is about 74.9911693307.

The spelling of 421726 in words is "four hundred twenty-one thousand, seven hundred twenty-six".