2272721 has 8 divisors (see below), whose sum is σ = 2491104. Its totient is φ = 2056320.

The previous prime is 2272691. The next prime is 2272727. The reversal of 2272721 is 1272722.

2272721 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 2272721 - 2⁶ = 2272657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2272727) 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, 3041 + ... + 3713.

It is an arithmetic number, because the mean of its divisors is an integer number (311388).

2^2272721 is an apocalyptic number.

It is an amenable number.

2272721 is a deficient number, since it is larger than the sum of its proper divisors (218383).

2272721 is a wasteful number, since it uses less digits than its factorization.

2272721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its digits is 784, while the sum is 23.

The square root of 2272721 is about 1507.5546424591. The cubic root of 2272721 is about 131.4766737577.

Subtracting from 2272721 its reverse (1272722), we obtain a palindrome (999999).

The spelling of 2272721 in words is "two million, two hundred seventy-two thousand, seven hundred twenty-one".