1100420 has 12 divisors (see below), whose sum is σ = 2310924. Its totient is φ = 440160.

The previous prime is 1100419. The next prime is 1100441. The reversal of 1100420 is 240011.

It can be written as a sum of positive squares in 2 ways, for example, as 350464 + 749956 = 592^2 + 866^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1100398 and 1100407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27491 + ... + 27530.

It is an arithmetic number, because the mean of its divisors is an integer number (192577).

2^1100420 is an apocalyptic number.

1100420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100420 is an abundant number, since it is smaller than the sum of its proper divisors (1210504).

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

1100420 is a wasteful number, since it uses less digits than its factorization.

1100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55030 (or 55028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1100420 is about 1049.0090562050. The cubic root of 1100420 is about 103.2411479844.

Adding to 1100420 its reverse (240011), we get a palindrome (1340431).

The spelling of 1100420 in words is "one million, one hundred thousand, four hundred twenty".