1240650005 has 16 divisors (see below), whose sum is σ = 1702107264. Its totient is φ = 850409280.

The previous prime is 1240649999. The next prime is 1240650007. The reversal of 1240650005 is 5000560421.

It is not a de Polignac number, because 1240650005 - 2⁶ = 1240649941 is a prime.

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 (1240650007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121550 + ... + 131360.

It is an arithmetic number, because the mean of its divisors is an integer number (106381704).

Almost surely, 2^1240650005 is an apocalyptic number.

It is an amenable number.

1240650005 is a deficient number, since it is larger than the sum of its proper divisors (461457259).

1240650005 is an equidigital number, since it uses as much as digits as its factorization.

1240650005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1240650005 is about 35222.8619649227. The cubic root of 1240650005 is about 1074.5247598286.

The spelling of 1240650005 in words is "one billion, two hundred forty million, six hundred fifty thousand, five".