5259721 has 2 divisors, whose sum is σ = 5259722. Its totient is φ = 5259720.

The previous prime is 5259689. The next prime is 5259731. The reversal of 5259721 is 1279525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4562496 + 697225 = 2136^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 5259721 - 2⁵ = 5259689 is a prime.

It is not a weakly prime, because it can be changed into another prime (5259731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629860 + 2629861.

It is an arithmetic number, because the mean of its divisors is an integer number (2629861).

Almost surely, 2^5259721 is an apocalyptic number.

It is an amenable number.

5259721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5259721 is an equidigital number, since it uses as much as digits as its factorization.

5259721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 31.

The square root of 5259721 is about 2293.4081625389. The cubic root of 5259721 is about 173.9085373896.

The spelling of 5259721 in words is "five million, two hundred fifty-nine thousand, seven hundred twenty-one".