1040120005 has 4 divisors (see below), whose sum is σ = 1248144012. Its totient is φ = 832096000.

The previous prime is 1040119981. The next prime is 1040120017. The reversal of 1040120005 is 5000210401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 256064004 + 784056001 = 16002^2 + 28001^2 .

It is not a de Polignac number, because 1040120005 - 2⁷ = 1040119877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104011996 + ... + 104012005.

It is an arithmetic number, because the mean of its divisors is an integer number (312036003).

Almost surely, 2^1040120005 is an apocalyptic number.

It is an amenable number.

1040120005 is a deficient number, since it is larger than the sum of its proper divisors (208024007).

1040120005 is an equidigital number, since it uses as much as digits as its factorization.

1040120005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208024006.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1040120005 is about 32250.8915380645. The cubic root of 1040120005 is about 1013.1983716144.

Adding to 1040120005 its reverse (5000210401), we get a palindrome (6040330406).

The spelling of 1040120005 in words is "one billion, forty million, one hundred twenty thousand, five".