2721145 has 8 divisors (see below), whose sum is σ = 3731904. Its totient is φ = 1865904.

The previous prime is 2721143. The next prime is 2721163. The reversal of 2721145 is 5411272.

It is a happy number.

2721145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2721145 - 2¹ = 2721143 is a prime.

It is a super-2 number, since 2×2721145² = 14809260222050, which contains 22 as substring.

It is a Duffinian number.

2721145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2721143) 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 in 7 ways as a sum of consecutive naturals, for example, 38839 + ... + 38908.

It is an arithmetic number, because the mean of its divisors is an integer number (466488).

2^2721145 is an apocalyptic number.

It is an amenable number.

2721145 is a deficient number, since it is larger than the sum of its proper divisors (1010759).

2721145 is an equidigital number, since it uses as much as digits as its factorization.

2721145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77759.

The product of its digits is 560, while the sum is 22.

The square root of 2721145 is about 1649.5893428366. The cubic root of 2721145 is about 139.6102253575.

The spelling of 2721145 in words is "two million, seven hundred twenty-one thousand, one hundred forty-five".