5121621 has 24 divisors (see below), whose sum is σ = 7931040. Its totient is φ = 3175200.

The previous prime is 5121593. The next prime is 5121631. The reversal of 5121621 is 1261215.

5121621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5121621 - 2¹⁰ = 5120597 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5121594 and 5121603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121631) 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 23 ways as a sum of consecutive naturals, for example, 10186 + ... + 10676.

It is an arithmetic number, because the mean of its divisors is an integer number (330460).

Almost surely, 2^5121621 is an apocalyptic number.

It is an amenable number.

5121621 is a deficient number, since it is larger than the sum of its proper divisors (2809419).

5121621 is a wasteful number, since it uses less digits than its factorization.

5121621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 574 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 5121621 is about 2263.0998652291. The cubic root of 5121621 is about 172.3729625470.

Adding to 5121621 its reverse (1261215), we get a palindrome (6382836).

The spelling of 5121621 in words is "five million, one hundred twenty-one thousand, six hundred twenty-one".