421430 has 32 divisors (see below), whose sum is σ = 837216. Its totient is φ = 152064.

The previous prime is 421423. The next prime is 421433. The reversal of 421430 is 34124.

421430 = 24² + 25² + ... + 108².

421430 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 (421433) by changing a digit.

421430 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 15 ways as a sum of consecutive naturals, for example, 6257 + ... + 6323.

It is an arithmetic number, because the mean of its divisors is an integer number (26163).

2⁴²¹⁴³⁰ is an apocalyptic number.

421430 is a deficient number, since it is larger than the sum of its proper divisors (415786).

421430 is a wasteful number, since it uses less digits than its factorization.

421430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 421430 is about 649.1764012963. The cubic root of 421430 is about 74.9736203522.

Adding to 421430 its reverse (34124), we get a palindrome (455554).

The spelling of 421430 in words is "four hundred twenty-one thousand, four hundred thirty".