445321253 has 6 divisors (see below), whose sum is σ = 482211954. Its totient is φ = 411065616.

The previous prime is 445321223. The next prime is 445321313. The reversal of 445321253 is 352123544.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 50027329 + 395293924 = 7073^2 + 19882^2 .

It is not a de Polignac number, because 445321253 - 2⁶ = 445321189 is a prime.

It is a super-3 number, since 3×445321253³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445321223) 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 5 ways as a sum of consecutive naturals, for example, 1317350 + ... + 1317687.

It is an arithmetic number, because the mean of its divisors is an integer number (80368659).

Almost surely, 2^445321253 is an apocalyptic number.

It is an amenable number.

445321253 is a deficient number, since it is larger than the sum of its proper divisors (36890701).

445321253 is a wasteful number, since it uses less digits than its factorization.

445321253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635063 (or 2635050 counting only the distinct ones).

The product of its digits is 14400, while the sum is 29.

The square root of 445321253 is about 21102.6361623376. The cubic root of 445321253 is about 763.6443463327.

Adding to 445321253 its reverse (352123544), we get a palindrome (797444797).

The spelling of 445321253 in words is "four hundred forty-five million, three hundred twenty-one thousand, two hundred fifty-three".