1181506 has 4 divisors (see below), whose sum is σ = 1772262. Its totient is φ = 590752.

The previous prime is 1181501. The next prime is 1181507. The reversal of 1181506 is 6051811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6051811 = 179 ⋅33809.

It can be written as a sum of positive squares in only one way, i.e., 1121481 + 60025 = 1059^2 + 245^2 .

It is not an unprimeable number, because it can be changed into a prime (1181501) 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 as a sum of consecutive naturals, namely, 295375 + ... + 295378.

2^1181506 is an apocalyptic number.

1181506 is a deficient number, since it is larger than the sum of its proper divisors (590756).

1181506 is an equidigital number, since it uses as much as digits as its factorization.

1181506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590755.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1181506 is about 1086.9710207729. The cubic root of 1181506 is about 105.7171168674.

The spelling of 1181506 in words is "one million, one hundred eighty-one thousand, five hundred six".