1161856 has 32 divisors (see below), whose sum is σ = 2402100. Its totient is φ = 559104.

The previous prime is 1161851. The next prime is 1161857. The reversal of 1161856 is 6581611.

It can be written as a sum of positive squares in 2 ways, for example, as 1032256 + 129600 = 1016^2 + 360^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3556 + ... + 3868.

2^1161856 is an apocalyptic number.

1161856 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 1161856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1201050).

1161856 is an abundant number, since it is smaller than the sum of its proper divisors (1240244).

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

1161856 is an equidigital number, since it uses as much as digits as its factorization.

1161856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 344 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 1161856 is about 1077.8942434209. The cubic root of 1161856 is about 105.1277658600.

It can be divided in two parts, 116 and 1856, that multiplied together give a square (215296 = 464²).

The spelling of 1161856 in words is "one million, one hundred sixty-one thousand, eight hundred fifty-six".