5526721 has 4 divisors (see below), whose sum is σ = 5593392. Its totient is φ = 5460052.

The previous prime is 5526691. The next prime is 5526743. The reversal of 5526721 is 1276255.

5526721 = T₁₉₁₈ + T₁₉₁₉ + T₁₉₂₀.

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 an emirpimes, since its reverse is a distinct semiprime: 1276255 = 5 ⋅255251.

It is a cyclic number.

It is not a de Polignac number, because 5526721 - 2⁷ = 5526593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5526721.

It is not an unprimeable number, because it can be changed into a prime (5526121) 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, 33211 + ... + 33376.

It is an arithmetic number, because the mean of its divisors is an integer number (1398348).

Almost surely, 2^5526721 is an apocalyptic number.

5526721 is the 1920-th centered triangular number.

It is an amenable number.

5526721 is a deficient number, since it is larger than the sum of its proper divisors (66671).

5526721 is an equidigital number, since it uses as much as digits as its factorization.

5526721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66670.

The product of its digits is 4200, while the sum is 28.

The square root of 5526721 is about 2350.8979135641. The cubic root of 5526721 is about 176.8028170043.

The spelling of 5526721 in words is "five million, five hundred twenty-six thousand, seven hundred twenty-one".