1061820 has 72 divisors (see below), whose sum is σ = 3420144. Its totient is φ = 265728.

The previous prime is 1061807. The next prime is 1061831. The reversal of 1061820 is 281601.

It is a super-2 number, since 2×1061820² = 2254923424800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1061793 and 1061802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2887 + ... + 3233.

It is an arithmetic number, because the mean of its divisors is an integer number (47502).

2^1061820 is an apocalyptic number.

1061820 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 1061820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1710072).

1061820 is an abundant number, since it is smaller than the sum of its proper divisors (2358324).

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

1061820 is a wasteful number, since it uses less digits than its factorization.

1061820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1061820 is about 1030.4465051617. The cubic root of 1061820 is about 102.0196040751.

It can be divided in two parts, 1061 and 820, that added together give a palindrome (1881).

The spelling of 1061820 in words is "one million, sixty-one thousand, eight hundred twenty".