5542721 has 2 divisors, whose sum is σ = 5542722. Its totient is φ = 5542720.

The previous prime is 5542717. The next prime is 5542723. The reversal of 5542721 is 1272455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4752400 + 790321 = 2180^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 5542721 - 2² = 5542717 is a prime.

Together with 5542723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5542723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2771360 + 2771361.

It is an arithmetic number, because the mean of its divisors is an integer number (2771361).

Almost surely, 2^5542721 is an apocalyptic number.

It is an amenable number.

5542721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5542721 is an equidigital number, since it uses as much as digits as its factorization.

5542721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 26.

The square root of 5542721 is about 2354.2984092931. The cubic root of 5542721 is about 176.9732688626.

The spelling of 5542721 in words is "five million, five hundred forty-two thousand, seven hundred twenty-one".