5621805 has 48 divisors (see below), whose sum is σ = 11566464. Its totient is φ = 2566080.

The previous prime is 5621779. The next prime is 5621809. The reversal of 5621805 is 5081265.

It is not a de Polignac number, because 5621805 - 2¹² = 5617709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621809) by changing a digit.

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 in 47 ways as a sum of consecutive naturals, for example, 8175 + ... + 8835.

It is an arithmetic number, because the mean of its divisors is an integer number (240968).

Almost surely, 2^5621805 is an apocalyptic number.

It is an amenable number.

5621805 is an abundant number, since it is smaller than the sum of its proper divisors (5944659).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5621805 is an equidigital number, since it uses as much as digits as its factorization.

5621805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 5621805 is about 2371.0345843112. The cubic root of 5621805 is about 177.8109869240.

The spelling of 5621805 in words is "five million, six hundred twenty-one thousand, eight hundred five".