2269921 has 4 divisors (see below), whose sum is σ = 2282644. Its totient is φ = 2257200.

The previous prime is 2269909. The next prime is 2269931. The reversal of 2269921 is 1299622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 829921 + 1440000 = 911^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2269921 - 2⁵ = 2269889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2269901) 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, 6090 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (570661).

2^2269921 is an apocalyptic number.

It is an amenable number.

2269921 is a deficient number, since it is larger than the sum of its proper divisors (12723).

2269921 is a wasteful number, since it uses less digits than its factorization.

2269921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12722.

The product of its digits is 3888, while the sum is 31.

The square root of 2269921 is about 1506.6257000330. The cubic root of 2269921 is about 131.4226583329.

Subtracting from 2269921 its reverse (1299622), we obtain a cube (970299 = 99³).

The spelling of 2269921 in words is "two million, two hundred sixty-nine thousand, nine hundred twenty-one".