311421 has 8 divisors (see below), whose sum is σ = 453024. Its totient is φ = 188720.

The previous prime is 311419. The next prime is 311447. The reversal of 311421 is 124113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 311421 - 2¹ = 311419 is a prime.

311421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 311397 and 311406.

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 311421.

It is not an unprimeable number, because it can be changed into a prime (311021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4686 + ... + 4751.

It is an arithmetic number, because the mean of its divisors is an integer number (56628).

2³¹¹⁴²¹ is an apocalyptic number.

It is an amenable number.

311421 is a deficient number, since it is larger than the sum of its proper divisors (141603).

311421 is a wasteful number, since it uses less digits than its factorization.

311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9451.

The product of its digits is 24, while the sum is 12.

The square root of 311421 is about 558.0510729315. The cubic root of 311421 is about 67.7822475080.

Adding to 311421 its reverse (124113), we get a palindrome (435534).

The spelling of 311421 in words is "three hundred eleven thousand, four hundred twenty-one", and thus it is an iban number.