2721171 has 8 divisors (see below), whose sum is σ = 3652864. Its totient is φ = 1801800.

The previous prime is 2721167. The next prime is 2721193. The reversal of 2721171 is 1711272.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2721171 - 2² = 2721167 is a prime.

It is a super-2 number, since 2×2721171² = 14809543222482, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2721371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2551 + ... + 3456.

It is an arithmetic number, because the mean of its divisors is an integer number (456608).

2^2721171 is an apocalyptic number.

2721171 is a deficient number, since it is larger than the sum of its proper divisors (931693).

2721171 is a wasteful number, since it uses less digits than its factorization.

2721171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6161.

The product of its digits is 196, while the sum is 21.

The square root of 2721171 is about 1649.5972235670. The cubic root of 2721171 is about 139.6106700054.

The spelling of 2721171 in words is "two million, seven hundred twenty-one thousand, one hundred seventy-one".