5646221 has 12 divisors (see below), whose sum is σ = 6679260. Its totient is φ = 4757760.

The previous prime is 5646131. The next prime is 5646229. The reversal of 5646221 is 1226465.

It can be written as a sum of positive squares in 2 ways, for example, as 1177225 + 4468996 = 1085^2 + 2114^2 .

It is not a de Polignac number, because 5646221 - 2¹⁸ = 5384077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5646229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2045 + ... + 3933.

It is an arithmetic number, because the mean of its divisors is an integer number (556605).

Almost surely, 2^5646221 is an apocalyptic number.

It is an amenable number.

5646221 is a deficient number, since it is larger than the sum of its proper divisors (1033039).

5646221 is a wasteful number, since it uses less digits than its factorization.

5646221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964 (or 1957 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 5646221 is about 2376.1778132118. The cubic root of 5646221 is about 178.0680314794.

The spelling of 5646221 in words is "five million, six hundred forty-six thousand, two hundred twenty-one".