1100020405 has 16 divisors (see below), whose sum is σ = 1461524544. Its totient is φ = 788071680.

The previous prime is 1100020357. The next prime is 1100020417. The reversal of 1100020405 is 5040200011.

It is not a de Polignac number, because 1100020405 - 2⁷ = 1100020277 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 15 ways as a sum of consecutive naturals, for example, 145572 + ... + 152941.

It is an arithmetic number, because the mean of its divisors is an integer number (91345284).

Almost surely, 2^1100020405 is an apocalyptic number.

It is an amenable number.

1100020405 is a deficient number, since it is larger than the sum of its proper divisors (361504139).

1100020405 is a wasteful number, since it uses less digits than its factorization.

1100020405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298596.

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

The square root of 1100020405 is about 33166.5555190767. Note that the first 4 decimals coincide. The cubic root of 1100020405 is about 1032.2864983489.

Adding to 1100020405 its reverse (5040200011), we get a palindrome (6140220416).

The spelling of 1100020405 in words is "one billion, one hundred million, twenty thousand, four hundred five".