450521 has 4 divisors (see below), whose sum is σ = 452532. Its totient is φ = 448512.

The previous prime is 450503. The next prime is 450529. The reversal of 450521 is 125054.

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

It can be written as a sum of positive squares in 2 ways, for example, as 235225 + 215296 = 485^2 + 464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450521 is a prime.

It is an Ulam number.

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

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 450521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (113133).

2⁴⁵⁰⁵²¹ is an apocalyptic number.

It is an amenable number.

450521 is a deficient number, since it is larger than the sum of its proper divisors (2011).

450521 is a wasteful number, since it uses less digits than its factorization.

450521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 450521 is about 671.2086113870. The cubic root of 450521 is about 76.6605057011.

Adding to 450521 its reverse (125054), we get a palindrome (575575).

The spelling of 450521 in words is "four hundred fifty thousand, five hundred twenty-one".