421470 has 64 divisors (see below), whose sum is σ = 1290240. Its totient is φ = 95904.

The previous prime is 421469. The next prime is 421471. The reversal of 421470 is 74124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421469) and next prime (421471).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 421470.

It is not an unprimeable number, because it can be changed into a prime (421471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1779 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2⁴²¹⁴⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645120).

421470 is an abundant number, since it is smaller than the sum of its proper divisors (868770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421470 is a wasteful number, since it uses less digits than its factorization.

421470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 421470 is about 649.2072088324. The cubic root of 421470 is about 74.9759923159.

Adding to 421470 its reverse (74124), we get a palindrome (495594).

The spelling of 421470 in words is "four hundred twenty-one thousand, four hundred seventy", and thus it is an iban number.