5266721 has 4 divisors (see below), whose sum is σ = 5271552. Its totient is φ = 5261892.

The previous prime is 5266711. The next prime is 5266727. The reversal of 5266721 is 1276625.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5266721 - 2¹⁰ = 5265697 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5266727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80 + ... + 3246.

It is an arithmetic number, because the mean of its divisors is an integer number (1317888).

Almost surely, 2^5266721 is an apocalyptic number.

It is an amenable number.

5266721 is a deficient number, since it is larger than the sum of its proper divisors (4831).

5266721 is a wasteful number, since it uses less digits than its factorization.

5266721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830.

The product of its digits is 5040, while the sum is 29.

The square root of 5266721 is about 2294.9337681075. The cubic root of 5266721 is about 173.9856530206.

The spelling of 5266721 in words is "five million, two hundred sixty-six thousand, seven hundred twenty-one".