2269721 has 8 divisors (see below), whose sum is σ = 2530080. Its totient is φ = 2023488.

The previous prime is 2269711. The next prime is 2269733. The reversal of 2269721 is 1279622.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2269721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2269711) 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, 3191 + ... + 3836.

It is an arithmetic number, because the mean of its divisors is an integer number (316260).

2^2269721 is an apocalyptic number.

It is an amenable number.

2269721 is a deficient number, since it is larger than the sum of its proper divisors (260359).

2269721 is a wasteful number, since it uses less digits than its factorization.

2269721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7063.

The product of its digits is 3024, while the sum is 29.

The square root of 2269721 is about 1506.5593250848. The cubic root of 2269721 is about 131.4187983889.

Subtracting from 2269721 its reverse (1279622), we obtain a palindrome (990099).

The spelling of 2269721 in words is "two million, two hundred sixty-nine thousand, seven hundred twenty-one".