450139 has 4 divisors (see below), whose sum is σ = 461160. Its totient is φ = 439120.

The previous prime is 450137. The next prime is 450161. The reversal of 450139 is 931054.

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

It is a cyclic number.

It is not a de Polignac number, because 450139 - 2¹ = 450137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450137) 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, 5449 + ... + 5530.

It is an arithmetic number, because the mean of its divisors is an integer number (115290).

2⁴⁵⁰¹³⁹ is an apocalyptic number.

450139 is a deficient number, since it is larger than the sum of its proper divisors (11021).

450139 is a wasteful number, since it uses less digits than its factorization.

450139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 450139 is about 670.9239897336. The cubic root of 450139 is about 76.6388325761.

The spelling of 450139 in words is "four hundred fifty thousand, one hundred thirty-nine".