5203721 has 2 divisors, whose sum is σ = 5203722. Its totient is φ = 5203720.

The previous prime is 5203711. The next prime is 5203729. The reversal of 5203721 is 1273025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3474496 + 1729225 = 1864^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 5203721 - 2²² = 1009417 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5203693 and 5203702.

It is not a weakly prime, because it can be changed into another prime (5203729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2601860 + 2601861.

It is an arithmetic number, because the mean of its divisors is an integer number (2601861).

Almost surely, 2^5203721 is an apocalyptic number.

It is an amenable number.

5203721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5203721 is an equidigital number, since it uses as much as digits as its factorization.

5203721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 5203721 is about 2281.1665875161. The cubic root of 5203721 is about 173.2891352628.

Adding to 5203721 its reverse (1273025), we get a palindrome (6476746).

The spelling of 5203721 in words is "five million, two hundred three thousand, seven hundred twenty-one".