312421 has 4 divisors (see below), whose sum is σ = 317152. Its totient is φ = 307692.

The previous prime is 312413. The next prime is 312427. The reversal of 312421 is 124213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312421 - 2³ = 312413 is a prime.

It is a Duffinian number.

312421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2265 + ... + 2398.

It is an arithmetic number, because the mean of its divisors is an integer number (79288).

2³¹²⁴²¹ is an apocalyptic number.

It is an amenable number.

312421 is a deficient number, since it is larger than the sum of its proper divisors (4731).

312421 is an equidigital number, since it uses as much as digits as its factorization.

312421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730.

The product of its digits is 48, while the sum is 13.

The square root of 312421 is about 558.9463301606. The cubic root of 312421 is about 67.8547215598.

Adding to 312421 its reverse (124213), we get a palindrome (436634).

The spelling of 312421 in words is "three hundred twelve thousand, four hundred twenty-one", and thus it is an iban number.