1105121040 has 160 divisors (see below), whose sum is σ = 3641552640. Its totient is φ = 276283392.

The previous prime is 1105120999. The next prime is 1105121063. The reversal of 1105121040 is 401215011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1790812 + ... + 1791428.

It is an arithmetic number, because the mean of its divisors is an integer number (22759704).

Almost surely, 2^1105121040 is an apocalyptic number.

1105121040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1105121040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1820776320).

1105121040 is an abundant number, since it is smaller than the sum of its proper divisors (2536431600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1105121040 is a wasteful number, since it uses less digits than its factorization.

1105121040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1105121040 is about 33243.3608409258. The cubic root of 1105121040 is about 1033.8795595169.

Adding to 1105121040 its reverse (401215011), we get a palindrome (1506336051).

The spelling of 1105121040 in words is "one billion, one hundred five million, one hundred twenty-one thousand, forty".