450121055 has 4 divisors (see below), whose sum is σ = 540145272. Its totient is φ = 360096840.

The previous prime is 450121037. The next prime is 450121057. The reversal of 450121055 is 550121054.

It is a happy number.

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

It is not a de Polignac number, because 450121055 - 2¹⁴ = 450104671 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 450121055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450121057) 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, 45012101 + ... + 45012110.

It is an arithmetic number, because the mean of its divisors is an integer number (135036318).

Almost surely, 2^450121055 is an apocalyptic number.

450121055 is a deficient number, since it is larger than the sum of its proper divisors (90024217).

450121055 is an equidigital number, since it uses as much as digits as its factorization.

450121055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90024216.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 450121055 is about 21216.0565374435. The cubic root of 450121055 is about 766.3781414834.

Subtracting 450121055 from its reverse (550121054), we obtain a palindrome (99999999).

The spelling of 450121055 in words is "four hundred fifty million, one hundred twenty-one thousand, fifty-five".