2721871 has 2 divisors, whose sum is σ = 2721872. Its totient is φ = 2721870.

The previous prime is 2721869. The next prime is 2721877. The reversal of 2721871 is 1781272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2721871 - 2¹ = 2721869 is a prime.

Together with 2721869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360935 + 1360936.

It is an arithmetic number, because the mean of its divisors is an integer number (1360936).

2^2721871 is an apocalyptic number.

2721871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721871 is an equidigital number, since it uses as much as digits as its factorization.

2721871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1568, while the sum is 28.

The square root of 2721871 is about 1649.8093829288. The cubic root of 2721871 is about 139.6226402308.

The spelling of 2721871 in words is "two million, seven hundred twenty-one thousand, eight hundred seventy-one".