445001243 has 4 divisors (see below), whose sum is σ = 445173648. Its totient is φ = 444828840.

The previous prime is 445001239. The next prime is 445001327. The reversal of 445001243 is 342100544.

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 445001243 - 2² = 445001239 is a prime.

It is a super-2 number, since 2×445001243² = 396052212543090098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445001443) 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, 82271 + ... + 87512.

It is an arithmetic number, because the mean of its divisors is an integer number (111293412).

Almost surely, 2^445001243 is an apocalyptic number.

445001243 is a deficient number, since it is larger than the sum of its proper divisors (172405).

445001243 is a wasteful number, since it uses less digits than its factorization.

445001243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172404.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 445001243 is about 21095.0525716339. The cubic root of 445001243 is about 763.4613829962.

Adding to 445001243 its reverse (342100544), we get a palindrome (787101787).

The spelling of 445001243 in words is "four hundred forty-five million, one thousand, two hundred forty-three".