1641822 has 64 divisors (see below), whose sum is σ = 4214784. Its totient is φ = 414720.

The previous prime is 1641821. The next prime is 1641833. The reversal of 1641822 is 2281461.

It is a junction number, because it is equal to n+sod(n) for n = 1641792 and 1641801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641821) 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 31 ways as a sum of consecutive naturals, for example, 16878 + ... + 16974.

It is an arithmetic number, because the mean of its divisors is an integer number (65856).

2^1641822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2107392).

1641822 is an abundant number, since it is smaller than the sum of its proper divisors (2572962).

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

1641822 is a wasteful number, since it uses less digits than its factorization.

1641822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153.

The product of its digits is 768, while the sum is 24.

The square root of 1641822 is about 1281.3360215026. The cubic root of 1641822 is about 117.9710261143.

The spelling of 1641822 in words is "one million, six hundred forty-one thousand, eight hundred twenty-two".