5641621 has 4 divisors (see below), whose sum is σ = 5705100. Its totient is φ = 5578144.

The previous prime is 5641607. The next prime is 5641633. The reversal of 5641621 is 1261465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1261465 = 5 ⋅252293.

It can be written as a sum of positive squares in 2 ways, for example, as 2788900 + 2852721 = 1670^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 5641621 - 2¹⁵ = 5608853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5641661) 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 3 ways as a sum of consecutive naturals, for example, 31606 + ... + 31783.

It is an arithmetic number, because the mean of its divisors is an integer number (1426275).

Almost surely, 2^5641621 is an apocalyptic number.

It is an amenable number.

5641621 is a deficient number, since it is larger than the sum of its proper divisors (63479).

5641621 is an equidigital number, since it uses as much as digits as its factorization.

5641621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63478.

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

The square root of 5641621 is about 2375.2096749550. The cubic root of 5641621 is about 178.0196607497.

The spelling of 5641621 in words is "five million, six hundred forty-one thousand, six hundred twenty-one".