1131690 has 64 divisors (see below), whose sum is σ = 3297024. Its totient is φ = 242688.

The previous prime is 1131677. The next prime is 1131701. The reversal of 1131690 is 961311.

It is a happy number.

It is a super-2 number, since 2×1131690² = 2561444512200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3412 + ... + 3728.

It is an arithmetic number, because the mean of its divisors is an integer number (51516).

2^1131690 is an apocalyptic number.

1131690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1648512).

1131690 is an abundant number, since it is smaller than the sum of its proper divisors (2165334).

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

1131690 is a wasteful number, since it uses less digits than its factorization.

1131690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

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

The square root of 1131690 is about 1063.8091934177. The cubic root of 1131690 is about 104.2099432625.

The spelling of 1131690 in words is "one million, one hundred thirty-one thousand, six hundred ninety".