421436 has 6 divisors (see below), whose sum is σ = 737520. Its totient is φ = 210716.

The previous prime is 421433. The next prime is 421453. The reversal of 421436 is 634124.

It is a happy number.

It is a d-powerful number, because it can be written as 4⁵ + 2¹⁷ + 4⁸ + 1 + 3¹¹ + 6⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52676 + ... + 52683.

It is an arithmetic number, because the mean of its divisors is an integer number (122920).

2⁴²¹⁴³⁶ is an apocalyptic number.

It is an amenable number.

421436 is a deficient number, since it is larger than the sum of its proper divisors (316084).

421436 is a wasteful number, since it uses less digits than its factorization.

421436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105363 (or 105361 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 421436 is about 649.1810225199. The cubic root of 421436 is about 74.9739761564.

The spelling of 421436 in words is "four hundred twenty-one thousand, four hundred thirty-six".