1105123215 has 48 divisors (see below), whose sum is σ = 2112525792. Its totient is φ = 491533056.

The previous prime is 1105123189. The next prime is 1105123219. The reversal of 1105123215 is 5123215011.

It is not a de Polignac number, because 1105123215 - 2⁵ = 1105123183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1105123191 and 1105123200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105123219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6877 + ... + 47513.

It is an arithmetic number, because the mean of its divisors is an integer number (44010954).

Almost surely, 2^1105123215 is an apocalyptic number.

1105123215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1105123215 is a deficient number, since it is larger than the sum of its proper divisors (1007402577).

1105123215 is a wasteful number, since it uses less digits than its factorization.

1105123215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40696 (or 40689 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1105123215 is about 33243.3935542086. The cubic root of 1105123215 is about 1033.8802377794.

Adding to 1105123215 its reverse (5123215011), we get a palindrome (6228338226).

The spelling of 1105123215 in words is "one billion, one hundred five million, one hundred twenty-three thousand, two hundred fifteen".