421834 has 16 divisors (see below), whose sum is σ = 748800. Its totient is φ = 174384.

The previous prime is 421831. The next prime is 421847. The reversal of 421834 is 438124.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 421834.

It is not an unprimeable number, because it can be changed into a prime (421831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114 + ... + 925.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2⁴²¹⁸³⁴ is an apocalyptic number.

421834 is a deficient number, since it is larger than the sum of its proper divisors (326966).

421834 is a wasteful number, since it uses less digits than its factorization.

421834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077.

The product of its digits is 768, while the sum is 22.

The square root of 421834 is about 649.4874902567. The cubic root of 421834 is about 74.9975702917.

Adding to 421834 its reverse (438124), we get a palindrome (859958).

Subtracting 421834 from its reverse (438124), we obtain a triangular number (16290 = T₁₈₀).

It can be divided in two parts, 42 and 1834, that multiplied together give a triangular number (77028 = T₃₉₂).

The spelling of 421834 in words is "four hundred twenty-one thousand, eight hundred thirty-four".