450987 has 4 divisors (see below), whose sum is σ = 601320. Its totient is φ = 300656.

The previous prime is 450971. The next prime is 450991. The reversal of 450987 is 789054.

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 450987 - 2⁴ = 450971 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

450987 is a lucky number.

It is a plaindrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 450987.

It is not an unprimeable number, because it can be changed into a prime (450917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75162 + ... + 75167.

It is an arithmetic number, because the mean of its divisors is an integer number (150330).

2⁴⁵⁰⁹⁸⁷ is an apocalyptic number.

450987 is a deficient number, since it is larger than the sum of its proper divisors (150333).

450987 is a wasteful number, since it uses less digits than its factorization.

450987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150332.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 450987 is about 671.5556566659. Note that the first 3 decimals coincide. The cubic root of 450987 is about 76.6869280622.

The spelling of 450987 in words is "four hundred fifty thousand, nine hundred eighty-seven".