8146821 has 4 divisors (see below), whose sum is σ = 10862432. Its totient is φ = 5431212.

The previous prime is 8146819. The next prime is 8146829. The reversal of 8146821 is 1286418.

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 not a de Polignac number, because 8146821 - 2¹ = 8146819 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 (8146829) 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, 1357801 + ... + 1357806.

It is an arithmetic number, because the mean of its divisors is an integer number (2715608).

Almost surely, 2^8146821 is an apocalyptic number.

It is an amenable number.

8146821 is a deficient number, since it is larger than the sum of its proper divisors (2715611).

8146821 is a wasteful number, since it uses less digits than its factorization.

8146821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715610.

The product of its digits is 3072, while the sum is 30.

The square root of 8146821 is about 2854.2636528534. The cubic root of 8146821 is about 201.2160988637.

It can be divided in two parts, 8146 and 821, that multiplied together give a palindrome (6687866).

The spelling of 8146821 in words is "eight million, one hundred forty-six thousand, eight hundred twenty-one".