1109620 has 24 divisors (see below), whose sum is σ = 2356200. Its totient is φ = 438912.

The previous prime is 1109611. The next prime is 1109629. The reversal of 1109620 is 269011.

It is an interprime number because it is at equal distance from previous prime (1109611) and next prime (1109629).

It can be written as a sum of positive squares in 4 ways, for example, as 345744 + 763876 = 588^2 + 874^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109629) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1926 + ... + 2434.

It is an arithmetic number, because the mean of its divisors is an integer number (98175).

2^1109620 is an apocalyptic number.

1109620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1109620 is an abundant number, since it is smaller than the sum of its proper divisors (1246580).

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

1109620 is a wasteful number, since it uses less digits than its factorization.

1109620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1109620 is about 1053.3850198289. The cubic root of 1109620 is about 103.5280638345.

It can be divided in two parts, 110 and 9620, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 1109620 in words is "one million, one hundred nine thousand, six hundred twenty".