2289521 has 8 divisors (see below), whose sum is σ = 2551080. Its totient is φ = 2040192.

The previous prime is 2289503. The next prime is 2289571. The reversal of 2289521 is 1259822.

It can be written as a sum of positive squares in 4 ways, for example, as 429025 + 1860496 = 655^2 + 1364^2 .

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-2289521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2289571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2660 + ... + 3413.

It is an arithmetic number, because the mean of its divisors is an integer number (318885).

2^2289521 is an apocalyptic number.

It is an amenable number.

2289521 is a deficient number, since it is larger than the sum of its proper divisors (261559).

2289521 is a wasteful number, since it uses less digits than its factorization.

2289521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115.

The product of its digits is 2880, while the sum is 29.

The square root of 2289521 is about 1513.1163207103. The cubic root of 2289521 is about 131.7998381998.

The spelling of 2289521 in words is "two million, two hundred eighty-nine thousand, five hundred twenty-one".