2752721 has 2 divisors, whose sum is σ = 2752722. Its totient is φ = 2752720.

The previous prime is 2752697. The next prime is 2752723. The reversal of 2752721 is 1272572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2560000 + 192721 = 1600^2 + 439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2752721 is a prime.

Together with 2752723, 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 (2752723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1376360 + 1376361.

It is an arithmetic number, because the mean of its divisors is an integer number (1376361).

2^2752721 is an apocalyptic number.

It is an amenable number.

2752721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2752721 is an equidigital number, since it uses as much as digits as its factorization.

2752721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1960, while the sum is 26.

The square root of 2752721 is about 1659.1326047064. The cubic root of 2752721 is about 140.1481594767.

The spelling of 2752721 in words is "two million, seven hundred fifty-two thousand, seven hundred twenty-one".