240120455 has 4 divisors (see below), whose sum is σ = 288144552. Its totient is φ = 192096360.

The previous prime is 240120443. The next prime is 240120457. The reversal of 240120455 is 554021042.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554021042 = 2 ⋅277010521.

It is a de Polignac number, because none of the positive numbers 2^k-240120455 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240120455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240120457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24012041 + ... + 24012050.

It is an arithmetic number, because the mean of its divisors is an integer number (72036138).

Almost surely, 2^240120455 is an apocalyptic number.

240120455 is a deficient number, since it is larger than the sum of its proper divisors (48024097).

240120455 is an equidigital number, since it uses as much as digits as its factorization.

240120455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48024096.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 240120455 is about 15495.8205655590. The cubic root of 240120455 is about 621.5504509386.

Adding to 240120455 its reverse (554021042), we get a palindrome (794141497).

The spelling of 240120455 in words is "two hundred forty million, one hundred twenty thousand, four hundred fifty-five".