2249521 has 4 divisors (see below), whose sum is σ = 2258532. Its totient is φ = 2240512.

The previous prime is 2249483. The next prime is 2249537. The reversal of 2249521 is 1259422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1259422 = 2 ⋅629711.

It can be written as a sum of positive squares in 2 ways, for example, as 2117025 + 132496 = 1455^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 2249521 - 2⁷ = 2249393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2249591) 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, 4120 + ... + 4633.

It is an arithmetic number, because the mean of its divisors is an integer number (564633).

2^2249521 is an apocalyptic number.

It is an amenable number.

2249521 is a deficient number, since it is larger than the sum of its proper divisors (9011).

2249521 is an equidigital number, since it uses as much as digits as its factorization.

2249521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010.

The product of its digits is 1440, while the sum is 25.

The square root of 2249521 is about 1499.8403248346. The cubic root of 2249521 is about 131.0277702718.

Subtracting from 2249521 its reverse (1259422), we obtain a palindrome (990099).

The spelling of 2249521 in words is "two million, two hundred forty-nine thousand, five hundred twenty-one".