1181040 has 160 divisors (see below), whose sum is σ = 4523520. Its totient is φ = 248832.

The previous prime is 1181039. The next prime is 1181051. The reversal of 1181040 is 401811.

1181040 = T₆₉ + T₇₀ + ... + T₁₉₄.

It is a Harshad number since it is a multiple of its sum of digits (15).

1181040 is an undulating number in base 11.

It is a zygodrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31902 + ... + 31938.

It is an arithmetic number, because the mean of its divisors is an integer number (28272).

2^1181040 is an apocalyptic number.

1181040 is a gapful number since it is divisible by the number (10) 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 1181040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2261760).

1181040 is an abundant number, since it is smaller than the sum of its proper divisors (3342480).

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

1181040 is a wasteful number, since it uses less digits than its factorization.

1181040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1181040 is about 1086.7566424918. The cubic root of 1181040 is about 105.7032163442.

Adding to 1181040 its reverse (401811), we get a palindrome (1582851).

The spelling of 1181040 in words is "one million, one hundred eighty-one thousand, forty".