421307 has 4 divisors (see below), whose sum is σ = 426720. Its totient is φ = 415896.

The previous prime is 421303. The next prime is 421313. The reversal of 421307 is 703124.

It is a happy number.

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 421307 - 2² = 421303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421303) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2588 + ... + 2745.

It is an arithmetic number, because the mean of its divisors is an integer number (106680).

2⁴²¹³⁰⁷ is an apocalyptic number.

421307 is a deficient number, since it is larger than the sum of its proper divisors (5413).

421307 is an equidigital number, since it uses as much as digits as its factorization.

421307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5412.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 421307 is about 649.0816589613. The cubic root of 421307 is about 74.9663256235.

The spelling of 421307 in words is "four hundred twenty-one thousand, three hundred seven", and thus it is an iban number.