3560821 has 4 divisors (see below), whose sum is σ = 3884544. Its totient is φ = 3237100.

The previous prime is 3560819. The next prime is 3560831. The reversal of 3560821 is 1280653.

It is a happy number.

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: 1280653 = 11 ⋅116423.

It is a cyclic number.

It is not a de Polignac number, because 3560821 - 2¹ = 3560819 is a prime.

It is a super-3 number, since 3×3560821³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3560831) 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, 161845 + ... + 161866.

It is an arithmetic number, because the mean of its divisors is an integer number (971136).

Almost surely, 2^3560821 is an apocalyptic number.

It is an amenable number.

3560821 is a deficient number, since it is larger than the sum of its proper divisors (323723).

3560821 is a wasteful number, since it uses less digits than its factorization.

3560821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323722.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3560821 is about 1887.0137784341. The cubic root of 3560821 is about 152.7038713781.

The spelling of 3560821 in words is "three million, five hundred sixty thousand, eight hundred twenty-one".