1181286 has 48 divisors (see below), whose sum is σ = 2770560. Its totient is φ = 362880.

The previous prime is 1181281. The next prime is 1181293. The reversal of 1181286 is 6821811.

It is a super-2 number, since 2×1181286² = 2790873227592, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16146 + ... + 16218.

It is an arithmetic number, because the mean of its divisors is an integer number (57720).

2^1181286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1181286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1385280).

1181286 is an abundant number, since it is smaller than the sum of its proper divisors (1589274).

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

1181286 is a wasteful number, since it uses less digits than its factorization.

1181286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 138 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 1181286 is about 1086.8698174115. The cubic root of 1181286 is about 105.7105548442.

The spelling of 1181286 in words is "one million, one hundred eighty-one thousand, two hundred eighty-six".