1051820 has 48 divisors (see below), whose sum is σ = 2757888. Its totient is φ = 327360.

The previous prime is 1051819. The next prime is 1051829. The reversal of 1051820 is 281501.

It is a super-2 number, since 2×1051820² = 2212650624800, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051829) by changing a digit.

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, 1199 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2^1051820 is an apocalyptic number.

1051820 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 1051820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378944).

1051820 is an abundant number, since it is smaller than the sum of its proper divisors (1706068).

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

1051820 is a wasteful number, since it uses less digits than its factorization.

1051820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1051820 is about 1025.5827611656. The cubic root of 1051820 is about 101.6983269069.

The spelling of 1051820 in words is "one million, fifty-one thousand, eight hundred twenty".