1040205811 has 4 divisors (see below), whose sum is σ = 1040499712. Its totient is φ = 1039911912.

The previous prime is 1040205781. The next prime is 1040205821. The reversal of 1040205811 is 1185020401.

1040205811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1040205811 - 2²⁹ = 503334899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040205821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141576 + ... + 148741.

It is an arithmetic number, because the mean of its divisors is an integer number (260124928).

Almost surely, 2^1040205811 is an apocalyptic number.

1040205811 is a deficient number, since it is larger than the sum of its proper divisors (293901).

1040205811 is an equidigital number, since it uses as much as digits as its factorization.

1040205811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293900.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 1040205811 is about 32252.2217994358. The cubic root of 1040205811 is about 1013.2262325370.

The spelling of 1040205811 in words is "one billion, forty million, two hundred five thousand, eight hundred eleven".