841566 has 32 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 248000.

The previous prime is 841559. The next prime is 841573. The reversal of 841566 is 665148.

It is an interprime number because it is at equal distance from previous prime (841559) and next prime (841573).

It is a congruent number.

It is an unprimeable number.

841566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2551 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁸⁴¹⁵⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 841566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943488).

841566 is an abundant number, since it is smaller than the sum of its proper divisors (1045410).

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

841566 is a wasteful number, since it uses less digits than its factorization.

841566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368.

The product of its digits is 5760, while the sum is 30.

The square root of 841566 is about 917.3690642266. The cubic root of 841566 is about 94.4124774037.

The spelling of 841566 in words is "eight hundred forty-one thousand, five hundred sixty-six".