2721023 has 2 divisors, whose sum is σ = 2721024. Its totient is φ = 2721022.

The previous prime is 2721013. The next prime is 2721031. The reversal of 2721023 is 3201272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2721023 - 2⁴ = 2721007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2720992 and 2721010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360511 + 1360512.

It is an arithmetic number, because the mean of its divisors is an integer number (1360512).

2^2721023 is an apocalyptic number.

2721023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721023 is an equidigital number, since it uses as much as digits as its factorization.

2721023 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 17.

The square root of 2721023 is about 1649.5523635217. The cubic root of 2721023 is about 139.6081388949.

Adding to 2721023 its reverse (3201272), we get a palindrome (5922295).

Subtracting 2721023 from its reverse (3201272), we obtain a square (480249 = 693²).

The spelling of 2721023 in words is "two million, seven hundred twenty-one thousand, twenty-three".