450581 has 2 divisors, whose sum is σ = 450582. Its totient is φ = 450580.

The previous prime is 450563. The next prime is 450587. The reversal of 450581 is 185054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448900 + 1681 = 670^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 450581 - 2¹⁰ = 449557 is a prime.

It is a super-2 number, since 2×450581² = 406046475122, which contains 22 as substring.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 450581.

It is not a weakly prime, because it can be changed into another prime (450587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225290 + 225291.

It is an arithmetic number, because the mean of its divisors is an integer number (225291).

2⁴⁵⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

450581 is a deficient number, since it is larger than the sum of its proper divisors (1).

450581 is an equidigital number, since it uses as much as digits as its factorization.

450581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 450581 is about 671.2533053922. The cubic root of 450581 is about 76.6639087435.

The spelling of 450581 in words is "four hundred fifty thousand, five hundred eighty-one".