5224721 has 2 divisors, whose sum is σ = 5224722. Its totient is φ = 5224720.

The previous prime is 5224717. The next prime is 5224757. The reversal of 5224721 is 1274225.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5013121 + 211600 = 2239^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 5224721 - 2² = 5224717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5224421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2612360 + 2612361.

It is an arithmetic number, because the mean of its divisors is an integer number (2612361).

Almost surely, 2^5224721 is an apocalyptic number.

It is an amenable number.

5224721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5224721 is an equidigital number, since it uses as much as digits as its factorization.

5224721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 23.

The square root of 5224721 is about 2285.7648610476. The cubic root of 5224721 is about 173.5219294204.

Adding to 5224721 its reverse (1274225), we get a palindrome (6498946).

The spelling of 5224721 in words is "five million, two hundred twenty-four thousand, seven hundred twenty-one".