450181 has 4 divisors (see below), whose sum is σ = 451552. Its totient is φ = 448812.

The previous prime is 450169. The next prime is 450193. The reversal of 450181 is 181054.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 181054 = 2 ⋅90527.

It is an interprime number because it is at equal distance from previous prime (450169) and next prime (450193).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450181 is a prime.

It is a super-2 number, since 2×450181² = 405325865522, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450101) 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, 136 + ... + 958.

It is an arithmetic number, because the mean of its divisors is an integer number (112888).

2⁴⁵⁰¹⁸¹ is an apocalyptic number.

It is an amenable number.

450181 is a deficient number, since it is larger than the sum of its proper divisors (1371).

450181 is an equidigital number, since it uses as much as digits as its factorization.

450181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 450181 is about 670.9552891214. The cubic root of 450181 is about 76.6412160849.

The spelling of 450181 in words is "four hundred fifty thousand, one hundred eighty-one".