421734 has 8 divisors (see below), whose sum is σ = 843480. Its totient is φ = 140576.

The previous prime is 421727. The next prime is 421739. The reversal of 421734 is 437124.

421734 is nontrivially palindromic in base 16.

It is a sphenic number, since it is the product of 3 distinct primes.

421734 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 421734.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 421734.

It is not an unprimeable number, because it can be changed into a prime (421739) by changing a digit.

421734 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 in 3 ways as a sum of consecutive naturals, for example, 35139 + ... + 35150.

It is an arithmetic number, because the mean of its divisors is an integer number (105435).

2⁴²¹⁷³⁴ is an apocalyptic number.

421734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421734 is a wasteful number, since it uses less digits than its factorization.

421734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70294.

The product of its digits is 672, while the sum is 21.

The square root of 421734 is about 649.4105019169. The cubic root of 421734 is about 74.9916435134.

Adding to 421734 its reverse (437124), we get a palindrome (858858).

The spelling of 421734 in words is "four hundred twenty-one thousand, seven hundred thirty-four".