2721571 has 4 divisors (see below), whose sum is σ = 2725000. Its totient is φ = 2718144.

The previous prime is 2721557. The next prime is 2721577. The reversal of 2721571 is 1751272.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2721571 - 2⁷ = 2721443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2721577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160 + ... + 2338.

It is an arithmetic number, because the mean of its divisors is an integer number (681250).

2^2721571 is an apocalyptic number.

2721571 is a deficient number, since it is larger than the sum of its proper divisors (3429).

2721571 is a wasteful number, since it uses less digits than its factorization.

2721571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428.

The product of its digits is 980, while the sum is 25.

The square root of 2721571 is about 1649.7184608290. The cubic root of 2721571 is about 139.6175103855.

Subtracting from 2721571 its reverse (1751272), we obtain a cube (970299 = 99³).

The spelling of 2721571 in words is "two million, seven hundred twenty-one thousand, five hundred seventy-one".