1105605612 has 120 divisors (see below), whose sum is σ = 2953685504. Its totient is φ = 360557568.

The previous prime is 1105605587. The next prime is 1105605619. The reversal of 1105605612 is 2165065011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1105605619) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3991218 + ... + 3991494.

Almost surely, 2^1105605612 is an apocalyptic number.

1105605612 is a gapful number since it is divisible by the number (12) 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 1105605612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1476842752).

1105605612 is an abundant number, since it is smaller than the sum of its proper divisors (1848079892).

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

1105605612 is a wasteful number, since it uses less digits than its factorization.

1105605612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1105605612 is about 33250.6482944318. The cubic root of 1105605612 is about 1034.0306488127.

It can be divided in two parts, 110560561 and 2, that multiplied together give a palindrome (221121122).

The spelling of 1105605612 in words is "one billion, one hundred five million, six hundred five thousand, six hundred twelve".