8420111 has 12 divisors (see below), whose sum is σ = 9850968. Its totient is φ = 7175952.

The previous prime is 8420051. The next prime is 8420119. The reversal of 8420111 is 1110248.

It is not a de Polignac number, because 8420111 - 2¹⁰ = 8419087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8420111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420119) 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 11 ways as a sum of consecutive naturals, for example, 10745 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (820914).

Almost surely, 2^8420111 is an apocalyptic number.

8420111 is a deficient number, since it is larger than the sum of its proper divisors (1430857).

8420111 is a wasteful number, since it uses less digits than its factorization.

8420111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 8420111 is about 2901.7427522094. The cubic root of 8420111 is about 203.4413702197.

Adding to 8420111 its reverse (1110248), we get a palindrome (9530359).

The spelling of 8420111 in words is "eight million, four hundred twenty thousand, one hundred eleven".