421215 has 8 divisors (see below), whose sum is σ = 673968. Its totient is φ = 224640.

The previous prime is 421207. The next prime is 421241. The reversal of 421215 is 512124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421215 - 2³ = 421207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 28081 = 421215 / (4 + 2 + 1 + 2 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 421194 and 421203.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14026 + ... + 14055.

It is an arithmetic number, because the mean of its divisors is an integer number (84246).

2⁴²¹²¹⁵ is an apocalyptic number.

421215 is a deficient number, since it is larger than the sum of its proper divisors (252753).

421215 is a wasteful number, since it uses less digits than its factorization.

421215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28089.

The product of its digits is 80, while the sum is 15.

The square root of 421215 is about 649.0107857347. The cubic root of 421215 is about 74.9608684754.

Adding to 421215 its reverse (512124), we get a palindrome (933339).

Subtracting 421215 from its reverse (512124), we obtain a palindrome (90909).

It can be divided in two parts, 421 and 215, that added together give a palindrome (636).

The spelling of 421215 in words is "four hundred twenty-one thousand, two hundred fifteen".