1001240205 has 64 divisors (see below), whose sum is σ = 1869170688. Its totient is φ = 448231680.

The previous prime is 1001240203. The next prime is 1001240221. The reversal of 1001240205 is 5020421001.

1001240205 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1001240205 - 2¹ = 1001240203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001240203) 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 63 ways as a sum of consecutive naturals, for example, 1141227 + ... + 1142103.

It is an arithmetic number, because the mean of its divisors is an integer number (29205792).

Almost surely, 2^1001240205 is an apocalyptic number.

1001240205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001240205 is a deficient number, since it is larger than the sum of its proper divisors (867930483).

1001240205 is a wasteful number, since it uses less digits than its factorization.

1001240205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1001240205 is about 31642.3798883712. The cubic root of 1001240205 is about 1000.4132308834.

Adding to 1001240205 its reverse (5020421001), we get a palindrome (6021661206).

The spelling of 1001240205 in words is "one billion, one million, two hundred forty thousand, two hundred five".