1065820 has 48 divisors (see below), whose sum is σ = 2677248. Its totient is φ = 348480.

The previous prime is 1065817. The next prime is 1065821. The reversal of 1065820 is 285601.

It is a happy number.

It is a super-2 number, since 2×1065820² = 2271944544800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1065791 and 1065800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3055 + ... + 3385.

It is an arithmetic number, because the mean of its divisors is an integer number (55776).

2^1065820 is an apocalyptic number.

1065820 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 1065820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1338624).

1065820 is an abundant number, since it is smaller than the sum of its proper divisors (1611428).

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

1065820 is a wasteful number, since it uses less digits than its factorization.

1065820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1065820 is about 1032.3855868812. The cubic root of 1065820 is about 102.1475501361.

The spelling of 1065820 in words is "one million, sixty-five thousand, eight hundred twenty".