7064821 has 4 divisors (see below), whose sum is σ = 7072992. Its totient is φ = 7056652.

The previous prime is 7064819. The next prime is 7064831. The reversal of 7064821 is 1284607.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1284607 = 59 ⋅21773.

It is a cyclic number.

It is not a de Polignac number, because 7064821 - 2¹ = 7064819 is a prime.

It is an Ulam number.

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 7064821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7064831) 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, 2611 + ... + 4576.

It is an arithmetic number, because the mean of its divisors is an integer number (1768248).

Almost surely, 2^7064821 is an apocalyptic number.

It is an amenable number.

7064821 is a deficient number, since it is larger than the sum of its proper divisors (8171).

7064821 is an equidigital number, since it uses as much as digits as its factorization.

7064821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8170.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 7064821 is about 2657.9730999391. The cubic root of 7064821 is about 191.8817721936.

The spelling of 7064821 in words is "seven million, sixty-four thousand, eight hundred twenty-one".