1131606 has 36 divisors (see below), whose sum is σ = 2854332. Its totient is φ = 323064.

The previous prime is 1131569. The next prime is 1131617. The reversal of 1131606 is 6061311.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 241 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (79287).

2^1131606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1427166).

1131606 is an abundant number, since it is smaller than the sum of its proper divisors (1722726).

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

1131606 is a wasteful number, since it uses less digits than its factorization.

1131606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1131606 is about 1063.7697119208. The cubic root of 1131606 is about 104.2073648615.

Adding to 1131606 its reverse (6061311), we get a palindrome (7192917).

The spelling of 1131606 in words is "one million, one hundred thirty-one thousand, six hundred six".