6821122 has 16 divisors (see below), whose sum is σ = 12756672. Its totient is φ = 2657520.

The previous prime is 6821117. The next prime is 6821141. The reversal of 6821122 is 2211286.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 6821093 and 6821102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21993 + ... + 22300.

It is an arithmetic number, because the mean of its divisors is an integer number (797292).

Almost surely, 2^6821122 is an apocalyptic number.

6821122 is a deficient number, since it is larger than the sum of its proper divisors (5935550).

6821122 is a wasteful number, since it uses less digits than its factorization.

6821122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44313.

The product of its digits is 384, while the sum is 22.

The square root of 6821122 is about 2611.7277806081. The cubic root of 6821122 is about 189.6496035063.

It can be divided in two parts, 682112 and 2, that multiplied together give a square (1364224 = 1168²).

The spelling of 6821122 in words is "six million, eight hundred twenty-one thousand, one hundred twenty-two".