1123687 has 4 divisors (see below), whose sum is σ = 1151136. Its totient is φ = 1096240.

The previous prime is 1123669. The next prime is 1123691. The reversal of 1123687 is 7863211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123687 - 2¹⁵ = 1090919 is a prime.

It is a Duffinian number.

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 (1123637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13663 + ... + 13744.

It is an arithmetic number, because the mean of its divisors is an integer number (287784).

2^1123687 is an apocalyptic number.

1123687 is a deficient number, since it is larger than the sum of its proper divisors (27449).

1123687 is an equidigital number, since it uses as much as digits as its factorization.

1123687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27448.

The product of its digits is 2016, while the sum is 28.

The square root of 1123687 is about 1060.0410369415. The cubic root of 1123687 is about 103.9637139190.

Adding to 1123687 its reverse (7863211), we get a palindrome (8986898).

The spelling of 1123687 in words is "one million, one hundred twenty-three thousand, six hundred eighty-seven".