1181090 has 16 divisors (see below), whose sum is σ = 2153088. Its totient is φ = 466416.

The previous prime is 1181057. The next prime is 1181093. The reversal of 1181090 is 901811.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1181093) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 119 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (134568).

2^1181090 is an apocalyptic number.

1181090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1181090 is a deficient number, since it is larger than the sum of its proper divisors (971998).

1181090 is a wasteful number, since it uses less digits than its factorization.

1181090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1181090 is about 1086.7796464785. The cubic root of 1181090 is about 105.7047079917.

The spelling of 1181090 in words is "one million, one hundred eighty-one thousand, ninety".