1040020205 has 32 divisors (see below), whose sum is σ = 1445713920. Its totient is φ = 703517760.

The previous prime is 1040020181. The next prime is 1040020213. The reversal of 1040020205 is 5020200401.

It is not a de Polignac number, because 1040020205 - 2⁸ = 1040019949 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1040020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1239176 + ... + 1240014.

It is an arithmetic number, because the mean of its divisors is an integer number (45178560).

Almost surely, 2^1040020205 is an apocalyptic number.

It is an amenable number.

1040020205 is a deficient number, since it is larger than the sum of its proper divisors (405693715).

1040020205 is a wasteful number, since it uses less digits than its factorization.

1040020205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1040020205 is about 32249.3442568992. The cubic root of 1040020205 is about 1013.1659649590.

Adding to 1040020205 its reverse (5020200401), we get a palindrome (6060220606).

The spelling of 1040020205 in words is "one billion, forty million, twenty thousand, two hundred five".