2721144 has 16 divisors (see below), whose sum is σ = 6802920. Its totient is φ = 907040.

The previous prime is 2721143. The next prime is 2721163. The reversal of 2721144 is 4411272.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2721144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721143) 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, 56667 + ... + 56714.

2^2721144 is an apocalyptic number.

2721144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2721144 is an abundant number, since it is smaller than the sum of its proper divisors (4081776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2721144 is a wasteful number, since it uses less digits than its factorization.

2721144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113390 (or 113386 counting only the distinct ones).

The product of its digits is 448, while the sum is 21.

The square root of 2721144 is about 1649.5890397308. The cubic root of 2721144 is about 139.6102082556.

The spelling of 2721144 in words is "two million, seven hundred twenty-one thousand, one hundred forty-four".