1243116 has 36 divisors (see below), whose sum is σ = 3591952. Its totient is φ = 355104.

The previous prime is 1243111. The next prime is 1243129. The reversal of 1243116 is 6113421.

It is a happy number.

1243116 is nontrivially palindromic in base 8.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1243111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2215 + ... + 2718.

2^1243116 is an apocalyptic number.

It is an amenable number.

1243116 is an abundant number, since it is smaller than the sum of its proper divisors (2348836).

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

1243116 is a wasteful number, since it uses less digits than its factorization.

1243116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4950 (or 4945 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1243116 is about 1114.9511200048. The cubic root of 1243116 is about 107.5236219948.

Adding to 1243116 its reverse (6113421), we get a palindrome (7356537).

It can be divided in two parts, 124 and 3116, that added together give a triangular number (3240 = T₈₀).

The spelling of 1243116 in words is "one million, two hundred forty-three thousand, one hundred sixteen".