421315 has 4 divisors (see below), whose sum is σ = 505584. Its totient is φ = 337048.

The previous prime is 421313. The next prime is 421331. The reversal of 421315 is 513124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421315 - 2¹ = 421313 is a prime.

It is a Duffinian number.

421315 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (421313) 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 in 3 ways as a sum of consecutive naturals, for example, 42127 + ... + 42136.

It is an arithmetic number, because the mean of its divisors is an integer number (126396).

2⁴²¹³¹⁵ is an apocalyptic number.

421315 is a deficient number, since it is larger than the sum of its proper divisors (84269).

421315 is an equidigital number, since it uses as much as digits as its factorization.

421315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84268.

The product of its digits is 120, while the sum is 16.

The square root of 421315 is about 649.0878214849. The cubic root of 421315 is about 74.9668001206.

Adding to 421315 its reverse (513124), we get a palindrome (934439).

Subtracting 421315 from its reverse (513124), we obtain a square (91809 = 303²).

The spelling of 421315 in words is "four hundred twenty-one thousand, three hundred fifteen".