2721142 has 16 divisors (see below), whose sum is σ = 4345200. Its totient is φ = 1274400.

The previous prime is 2721137. The next prime is 2721143. The reversal of 2721142 is 2411272.

It is a happy number.

2721142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2721142² = 14809227568328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 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, 3484 + ... + 4192.

It is an arithmetic number, because the mean of its divisors is an integer number (271575).

2^2721142 is an apocalyptic number.

2721142 is a deficient number, since it is larger than the sum of its proper divisors (1624058).

2721142 is a wasteful number, since it uses less digits than its factorization.

2721142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831.

The product of its digits is 224, while the sum is 19.

The square root of 2721142 is about 1649.5884335191. The cubic root of 2721142 is about 139.6101740518.

The spelling of 2721142 in words is "two million, seven hundred twenty-one thousand, one hundred forty-two".