1131906 has 16 divisors (see below), whose sum is σ = 2383200. Its totient is φ = 357408.

The previous prime is 1131883. The next prime is 1131913. The reversal of 1131906 is 6091311.

It is a happy number.

It is a super-2 number, since 2×1131906² = 2562422385672, which contains 22 as substring.

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, 4851 + ... + 5078.

It is an arithmetic number, because the mean of its divisors is an integer number (148950).

2^1131906 is an apocalyptic number.

1131906 is an abundant number, since it is smaller than the sum of its proper divisors (1251294).

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

1131906 is a wasteful number, since it uses less digits than its factorization.

1131906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9953.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1131906 is about 1063.9107105392. The cubic root of 1131906 is about 104.2165728506.

The spelling of 1131906 in words is "one million, one hundred thirty-one thousand, nine hundred six".