500001243 has 24 divisors (see below), whose sum is σ = 783065088. Its totient is φ = 282932496.

The previous prime is 500001179. The next prime is 500001251. The reversal of 500001243 is 342100005.

It is not a de Polignac number, because 500001243 - 2⁶ = 500001179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (500001043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1371 + ... + 31652.

It is an arithmetic number, because the mean of its divisors is an integer number (32627712).

Almost surely, 2^500001243 is an apocalyptic number.

500001243 is a deficient number, since it is larger than the sum of its proper divisors (283063845).

500001243 is a wasteful number, since it uses less digits than its factorization.

500001243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33143 (or 33136 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 500001243 is about 22360.7075693056. The cubic root of 500001243 is about 793.7011836967.

Adding to 500001243 its reverse (342100005), we get a palindrome (842101248).

The spelling of 500001243 in words is "five hundred million, one thousand, two hundred forty-three".