2240521 has 4 divisors (see below), whose sum is σ = 2243844. Its totient is φ = 2237200.

The previous prime is 2240507. The next prime is 2240531. The reversal of 2240521 is 1250422.

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 455625 + 1784896 = 675^2 + 1336^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240521 - 2⁵ = 2240489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2240495 and 2240504.

It is not an unprimeable number, because it can be changed into a prime (2240531) 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, 250 + ... + 2131.

It is an arithmetic number, because the mean of its divisors is an integer number (560961).

2^2240521 is an apocalyptic number.

It is an amenable number.

2240521 is a deficient number, since it is larger than the sum of its proper divisors (3323).

2240521 is an equidigital number, since it uses as much as digits as its factorization.

2240521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2240521 is about 1496.8369984738. The cubic root of 2240521 is about 130.8527958209.

Adding to 2240521 its reverse (1250422), we get a palindrome (3490943).

Subtracting from 2240521 its reverse (1250422), we obtain a palindrome (990099).

The spelling of 2240521 in words is "two million, two hundred forty thousand, five hundred twenty-one".