1099020 has 48 divisors (see below), whose sum is σ = 3316320. Its totient is φ = 270336.

The previous prime is 1098989. The next prime is 1099031. The reversal of 1099020 is 209901.

It is a happy number.

1099020 is nontrivially palindromic in base 8.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 76 + ... + 1484.

It is an arithmetic number, because the mean of its divisors is an integer number (69090).

2^1099020 is an apocalyptic number.

1099020 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 1099020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658160).

1099020 is an abundant number, since it is smaller than the sum of its proper divisors (2217300).

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

1099020 is a wasteful number, since it uses less digits than its factorization.

1099020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1432 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1099020 is about 1048.3415473976. The cubic root of 1099020 is about 103.1973468460.

The spelling of 1099020 in words is "one million, ninety-nine thousand, twenty".