440521 has 4 divisors (see below), whose sum is σ = 466452. Its totient is φ = 414592.

The previous prime is 440509. The next prime is 440527. The reversal of 440521 is 125044.

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 308025 + 132496 = 555^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 440521 - 2⁷ = 440393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440495 and 440504.

It is not an unprimeable number, because it can be changed into a prime (440527) 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, 12940 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (116613).

2⁴⁴⁰⁵²¹ is an apocalyptic number.

It is an amenable number.

440521 is a deficient number, since it is larger than the sum of its proper divisors (25931).

440521 is a wasteful number, since it uses less digits than its factorization.

440521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25930.

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

The square root of 440521 is about 663.7175604126. The cubic root of 440521 is about 76.0890576503.

Adding to 440521 its reverse (125044), we get a palindrome (565565).

It can be divided in two parts, 440 and 521, that added together give a square (961 = 31²).

The spelling of 440521 in words is "four hundred forty thousand, five hundred twenty-one".