2610721 has 2 divisors, whose sum is σ = 2610722. Its totient is φ = 2610720.

The previous prime is 2610719. The next prime is 2610737. The reversal of 2610721 is 1270162.

2610721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2371600 + 239121 = 1540^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2610721 - 2¹ = 2610719 is a prime.

Together with 2610719, 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 (2610701) 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 as a sum of consecutive naturals, namely, 1305360 + 1305361.

It is an arithmetic number, because the mean of its divisors is an integer number (1305361).

2^2610721 is an apocalyptic number.

It is an amenable number.

2610721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2610721 is an equidigital number, since it uses as much as digits as its factorization.

2610721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 2610721 is about 1615.7725706299. The cubic root of 2610721 is about 137.6956289737.

Adding to 2610721 its reverse (1270162), we get a palindrome (3880883).

The spelling of 2610721 in words is "two million, six hundred ten thousand, seven hundred twenty-one".