1161688 has 32 divisors (see below), whose sum is σ = 2439360. Its totient is φ = 514080.

The previous prime is 1161683. The next prime is 1161691. The reversal of 1161688 is 8861611.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161683) 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 7 ways as a sum of consecutive naturals, for example, 3631 + ... + 3937.

It is an arithmetic number, because the mean of its divisors is an integer number (76230).

2^1161688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1219680).

1161688 is an abundant number, since it is smaller than the sum of its proper divisors (1277672).

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

1161688 is a wasteful number, since it uses less digits than its factorization.

1161688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 363 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 1161688 is about 1077.8163108805. The cubic root of 1161688 is about 105.1226985894.

It can be divided in two parts, 1161 and 688, that added together give a square (1849 = 43²).

The spelling of 1161688 in words is "one million, one hundred sixty-one thousand, six hundred eighty-eight".