1100400505 has 16 divisors (see below), whose sum is σ = 1370995920. Its totient is φ = 846865152.

The previous prime is 1100400493. The next prime is 1100400527. The reversal of 1100400505 is 5050040011.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 17464041 + 1082936464 = 4179^2 + 32908^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100400505 - 2⁷ = 1100400377 is a prime.

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, 26467 + ... + 53863.

It is an arithmetic number, because the mean of its divisors is an integer number (85687245).

Almost surely, 2^1100400505 is an apocalyptic number.

It is an amenable number.

1100400505 is a deficient number, since it is larger than the sum of its proper divisors (270595415).

1100400505 is a wasteful number, since it uses less digits than its factorization.

1100400505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27708.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1100400505 is about 33172.2851941195. The cubic root of 1100400505 is about 1032.4053830871.

Adding to 1100400505 its reverse (5050040011), we get a palindrome (6150440516).

The spelling of 1100400505 in words is "one billion, one hundred million, four hundred thousand, five hundred five".