1240200205 has 16 divisors (see below), whose sum is σ = 1568810880. Its totient is φ = 938596032.

The previous prime is 1240200197. The next prime is 1240200209. The reversal of 1240200205 is 5020020421.

It is a cyclic number.

It is not a de Polignac number, because 1240200205 - 2³ = 1240200197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240200209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60087 + ... + 78043.

It is an arithmetic number, because the mean of its divisors is an integer number (98050680).

Almost surely, 2^1240200205 is an apocalyptic number.

It is an amenable number.

1240200205 is a deficient number, since it is larger than the sum of its proper divisors (328610675).

1240200205 is a wasteful number, since it uses less digits than its factorization.

1240200205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18708.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1240200205 is about 35216.4763285596. The cubic root of 1240200205 is about 1074.3948871391.

Adding to 1240200205 its reverse (5020020421), we get a palindrome (6260220626).

The spelling of 1240200205 in words is "one billion, two hundred forty million, two hundred thousand, two hundred five".