5616421 has 4 divisors (see below), whose sum is σ = 5622892. Its totient is φ = 5609952.

The previous prime is 5616407. The next prime is 5616427. The reversal of 5616421 is 1246165.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1246165 = 5 ⋅249233.

It can be written as a sum of positive squares in 2 ways, for example, as 4536900 + 1079521 = 2130^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 5616421 - 2⁵ = 5616389 is a prime.

It is a Duffinian number.

5616421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5616427) 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, 1686 + ... + 3751.

It is an arithmetic number, because the mean of its divisors is an integer number (1405723).

Almost surely, 2^5616421 is an apocalyptic number.

It is an amenable number.

5616421 is a deficient number, since it is larger than the sum of its proper divisors (6471).

5616421 is a wasteful number, since it uses less digits than its factorization.

5616421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6470.

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

The square root of 5616421 is about 2369.8989429931. The cubic root of 5616421 is about 177.7542056275.

The spelling of 5616421 in words is "five million, six hundred sixteen thousand, four hundred twenty-one".