2259521 has 16 divisors (see below), whose sum is σ = 2680128. Its totient is φ = 1881600.

The previous prime is 2259503. The next prime is 2259527. The reversal of 2259521 is 1259522.

2259521 = 63² + 64² + ... + 191².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2259521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2259527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7901 + ... + 8181.

It is an arithmetic number, because the mean of its divisors is an integer number (167508).

2^2259521 is an apocalyptic number.

It is an amenable number.

2259521 is a deficient number, since it is larger than the sum of its proper divisors (420607).

2259521 is a wasteful number, since it uses less digits than its factorization.

2259521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its digits is 1800, while the sum is 26.

The square root of 2259521 is about 1503.1703163647. The cubic root of 2259521 is about 131.2216398286.

Subtracting from 2259521 its reverse (1259522), we obtain a palindrome (999999).

The spelling of 2259521 in words is "two million, two hundred fifty-nine thousand, five hundred twenty-one".