1205856 has 72 divisors (see below), whose sum is σ = 3538080. Its totient is φ = 389376.

The previous prime is 1205843. The next prime is 1205891. The reversal of 1205856 is 6585021.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15225 + ... + 15303.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2^1205856 is an apocalyptic number.

1205856 is a gapful number since it is divisible by the number (16) 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 1205856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769040).

1205856 is an abundant number, since it is smaller than the sum of its proper divisors (2332224).

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

1205856 is a wasteful number, since it uses less digits than its factorization.

1205856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1205856 is about 1098.1147481024. The cubic root of 1205856 is about 106.4384356212.

The spelling of 1205856 in words is "one million, two hundred five thousand, eight hundred fifty-six".