1026740005 has 4 divisors (see below), whose sum is σ = 1232088012. Its totient is φ = 821392000.

The previous prime is 1026739969. The next prime is 1026740021. The reversal of 1026740005 is 5000476201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5000476201 = 7 ⋅714353743.

It can be written as a sum of positive squares in 2 ways, for example, as 689430049 + 337309956 = 26257^2 + 18366^2 .

It is not a de Polignac number, because 1026740005 - 2⁷ = 1026739877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102673996 + ... + 102674005.

It is an arithmetic number, because the mean of its divisors is an integer number (308022003).

Almost surely, 2^1026740005 is an apocalyptic number.

It is an amenable number.

1026740005 is a deficient number, since it is larger than the sum of its proper divisors (205348007).

1026740005 is an equidigital number, since it uses as much as digits as its factorization.

1026740005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205348006.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1026740005 is about 32042.7839770517. The cubic root of 1026740005 is about 1008.8350470612.

The spelling of 1026740005 in words is "one billion, twenty-six million, seven hundred forty thousand, five".