240447 has 4 divisors (see below), whose sum is σ = 320600. Its totient is φ = 160296.

The previous prime is 240437. The next prime is 240473. The reversal of 240447 is 744042.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 240447 - 2⁷ = 240319 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240437) 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 3 ways as a sum of consecutive naturals, for example, 40072 + ... + 40077.

It is an arithmetic number, because the mean of its divisors is an integer number (80150).

2²⁴⁰⁴⁴⁷ is an apocalyptic number.

240447 is a deficient number, since it is larger than the sum of its proper divisors (80153).

240447 is an equidigital number, since it uses as much as digits as its factorization.

240447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80152.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 240447 is about 490.3539537926. The cubic root of 240447 is about 62.1832076615.

Adding to 240447 its reverse (744042), we get a palindrome (984489).

The spelling of 240447 in words is "two hundred forty thousand, four hundred forty-seven", and thus it is an iban number.