1105421100 has 72 divisors (see below), whose sum is σ = 3655266048. Its totient is φ = 252667200.

The previous prime is 1105421071. The next prime is 1105421113. The reversal of 1105421100 is 11245011.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1105421100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261096 + ... + 265295.

It is an arithmetic number, because the mean of its divisors is an integer number (50767584).

Almost surely, 2^1105421100 is an apocalyptic number.

1105421100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1105421100 is an abundant number, since it is smaller than the sum of its proper divisors (2549844948).

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

1105421100 is a wasteful number, since it uses less digits than its factorization.

1105421100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526415 (or 526408 counting only the distinct ones).

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

The square root of 1105421100 is about 33247.8736162179. The cubic root of 1105421100 is about 1033.9731232733.

Adding to 1105421100 its reverse (11245011), we get a palindrome (1116666111).

The spelling of 1105421100 in words is "one billion, one hundred five million, four hundred twenty-one thousand, one hundred".