6821354 has 4 divisors (see below), whose sum is σ = 10232034. Its totient is φ = 3410676.

The previous prime is 6821303. The next prime is 6821383. The reversal of 6821354 is 4531286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4531286 = 2 ⋅2265643.

It can be written as a sum of positive squares in only one way, i.e., 6682225 + 139129 = 2585^2 + 373^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1705337 + ... + 1705340.

Almost surely, 2^6821354 is an apocalyptic number.

6821354 is a deficient number, since it is larger than the sum of its proper divisors (3410680).

6821354 is a wasteful number, since it uses less digits than its factorization.

6821354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410679.

The product of its digits is 5760, while the sum is 29.

The square root of 6821354 is about 2611.7721952728. The cubic root of 6821354 is about 189.6517536027.

The spelling of 6821354 in words is "six million, eight hundred twenty-one thousand, three hundred fifty-four".