1123690 has 16 divisors (see below), whose sum is σ = 2077992. Its totient is φ = 437184.

The previous prime is 1123669. The next prime is 1123691. The reversal of 1123690 is 963211.

It can be written as a sum of positive squares in 4 ways, for example, as 1121481 + 2209 = 1059^2 + 47^2 .

It is a super-2 number, since 2×1123690² = 2525358432200, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149 + ... + 1888.

2^1123690 is an apocalyptic number.

1123690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1123690 is a deficient number, since it is larger than the sum of its proper divisors (954302).

1123690 is a wasteful number, since it uses less digits than its factorization.

1123690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1123690 is about 1060.0424519801. The cubic root of 1123690 is about 103.9638064391.

The spelling of 1123690 in words is "one million, one hundred twenty-three thousand, six hundred ninety".