8421311 has 4 divisors (see below), whose sum is σ = 8648952. Its totient is φ = 8193672.

The previous prime is 8421251. The next prime is 8421403. The reversal of 8421311 is 1131248.

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 8421311 - 2¹⁴ = 8404927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421911) 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, 113765 + ... + 113838.

It is an arithmetic number, because the mean of its divisors is an integer number (2162238).

Almost surely, 2^8421311 is an apocalyptic number.

8421311 is a deficient number, since it is larger than the sum of its proper divisors (227641).

8421311 is a wasteful number, since it uses less digits than its factorization.

8421311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227640.

The product of its digits is 192, while the sum is 20.

The square root of 8421311 is about 2901.9495171350. The cubic root of 8421311 is about 203.4510343063.

Adding to 8421311 its reverse (1131248), we get a palindrome (9552559).

The spelling of 8421311 in words is "eight million, four hundred twenty-one thousand, three hundred eleven".