1105020 has 72 divisors (see below), whose sum is σ = 3835104. Its totient is φ = 252288.

The previous prime is 1105019. The next prime is 1105033. The reversal of 1105020 is 205011.

1105020 = T₁₇₀ + T₁₇₁ + ... + T₂₂₅.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1104993 and 1105011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 822 + ... + 1698.

2^1105020 is an apocalyptic number.

1105020 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 1105020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1917552).

1105020 is an abundant number, since it is smaller than the sum of its proper divisors (2730084).

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

1105020 is a wasteful number, since it uses less digits than its factorization.

1105020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 1105020 is about 1051.1993150683. The cubic root of 1105020 is about 103.3848049733.

Subtracting from 1105020 its reverse (205011), we obtain a palindrome (900009).

The spelling of 1105020 in words is "one million, one hundred five thousand, twenty".