1131406 has 8 divisors (see below), whose sum is σ = 1755720. Its totient is φ = 546168.

The previous prime is 1131397. The next prime is 1131413. The reversal of 1131406 is 6041311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1131406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9696 + ... + 9811.

It is an arithmetic number, because the mean of its divisors is an integer number (219465).

2^1131406 is an apocalyptic number.

1131406 is a deficient number, since it is larger than the sum of its proper divisors (624314).

1131406 is a wasteful number, since it uses less digits than its factorization.

1131406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19538.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1131406 is about 1063.6757024582. The cubic root of 1131406 is about 104.2012252979.

Adding to 1131406 its reverse (6041311), we get a palindrome (7172717).

The spelling of 1131406 in words is "one million, one hundred thirty-one thousand, four hundred six".