1242118 has 4 divisors (see below), whose sum is σ = 1863180. Its totient is φ = 621058.

The previous prime is 1242107. The next prime is 1242119. The reversal of 1242118 is 8112421.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1242095 and 1242104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310528 + ... + 310531.

It is an arithmetic number, because the mean of its divisors is an integer number (465795).

2^1242118 is an apocalyptic number.

1242118 is a deficient number, since it is larger than the sum of its proper divisors (621062).

1242118 is an equidigital number, since it uses as much as digits as its factorization.

1242118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621061.

The product of its digits is 128, while the sum is 19.

The square root of 1242118 is about 1114.5034768900. The cubic root of 1242118 is about 107.4948402066.

Adding to 1242118 its reverse (8112421), we get a palindrome (9354539).

The spelling of 1242118 in words is "one million, two hundred forty-two thousand, one hundred eighteen".