5122721 has 8 divisors (see below), whose sum is σ = 5422464. Its totient is φ = 4829440.

The previous prime is 5122717. The next prime is 5122727. The reversal of 5122721 is 1272215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5122721 - 2² = 5122717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5122693 and 5122702.

It is not an unprimeable number, because it can be changed into a prime (5122727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65 + ... + 3201.

It is an arithmetic number, because the mean of its divisors is an integer number (677808).

Almost surely, 2^5122721 is an apocalyptic number.

It is an amenable number.

5122721 is a deficient number, since it is larger than the sum of its proper divisors (299743).

5122721 is a wasteful number, since it uses less digits than its factorization.

5122721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231.

The product of its digits is 280, while the sum is 20.

The square root of 5122721 is about 2263.3428816686. The cubic root of 5122721 is about 172.3853021745.

Adding to 5122721 its reverse (1272215), we get a palindrome (6394936).

The spelling of 5122721 in words is "five million, one hundred twenty-two thousand, seven hundred twenty-one".