421894 has 16 divisors (see below), whose sum is σ = 700416. Its totient is φ = 189000.

The previous prime is 421891. The next prime is 421907. The reversal of 421894 is 498124.

421894 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2719 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (43776).

2⁴²¹⁸⁹⁴ is an apocalyptic number.

421894 is a deficient number, since it is larger than the sum of its proper divisors (278522).

421894 is a wasteful number, since it uses less digits than its factorization.

421894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291.

The product of its digits is 2304, while the sum is 28.

The square root of 421894 is about 649.5336788805. The cubic root of 421894 is about 75.0011259090.

It can be divided in two parts, 42 and 1894, that added together give a square (1936 = 44²).

The spelling of 421894 in words is "four hundred twenty-one thousand, eight hundred ninety-four".