5226721 has 4 divisors (see below), whose sum is σ = 5354244. Its totient is φ = 5099200.

The previous prime is 5226707. The next prime is 5226733. The reversal of 5226721 is 1276225.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1597696 + 3629025 = 1264^2 + 1905^2 .

It is a cyclic number.

It is not a de Polignac number, because 5226721 - 2¹³ = 5218529 is a prime.

It is a super-2 number, since 2×5226721² = 54637224823682, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5226791) 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 3 ways as a sum of consecutive naturals, for example, 63700 + ... + 63781.

It is an arithmetic number, because the mean of its divisors is an integer number (1338561).

Almost surely, 2^5226721 is an apocalyptic number.

It is an amenable number.

5226721 is a deficient number, since it is larger than the sum of its proper divisors (127523).

5226721 is a wasteful number, since it uses less digits than its factorization.

5226721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127522.

The product of its digits is 1680, while the sum is 25.

The square root of 5226721 is about 2286.2023095081. The cubic root of 5226721 is about 173.5440677371.

The spelling of 5226721 in words is "five million, two hundred twenty-six thousand, seven hundred twenty-one".