421694 has 24 divisors (see below), whose sum is σ = 794808. Its totient is φ = 166320.

The previous prime is 421691. The next prime is 421697. The reversal of 421694 is 496124.

421694 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (421691) and next prime (421697).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421691) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1109 + ... + 1439.

It is an arithmetic number, because the mean of its divisors is an integer number (33117).

2⁴²¹⁶⁹⁴ is an apocalyptic number.

421694 is a deficient number, since it is larger than the sum of its proper divisors (373114).

421694 is a wasteful number, since it uses less digits than its factorization.

421694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 353 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 421694 is about 649.3797040253. The cubic root of 421694 is about 74.9892725398.

The spelling of 421694 in words is "four hundred twenty-one thousand, six hundred ninety-four".