1181906 has 16 divisors (see below), whose sum is σ = 1997568. Its totient is φ = 519600.

The previous prime is 1181897. The next prime is 1181911. The reversal of 1181906 is 6091811.

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 7 ways as a sum of consecutive naturals, for example, 185 + ... + 1548.

It is an arithmetic number, because the mean of its divisors is an integer number (124848).

2^1181906 is an apocalyptic number.

1181906 is a deficient number, since it is larger than the sum of its proper divisors (815662).

1181906 is a wasteful number, since it uses less digits than its factorization.

1181906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1181906 is about 1087.1550027480. The cubic root of 1181906 is about 105.7290457321.

The spelling of 1181906 in words is "one million, one hundred eighty-one thousand, nine hundred six".