1242143 has 8 divisors (see below), whose sum is σ = 1443360. Its totient is φ = 1046880.

The previous prime is 1242121. The next prime is 1242151. The reversal of 1242143 is 3412421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242143 - 2¹⁴ = 1225759 is a prime.

It is a d-powerful number, because it can be written as 1 + 2 + 4⁷ + 2⁵ + 1 + 4¹⁰ + 3¹¹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242103) 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, 1028 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (180420).

2^1242143 is an apocalyptic number.

1242143 is a deficient number, since it is larger than the sum of its proper divisors (201217).

1242143 is an equidigital number, since it uses as much as digits as its factorization.

1242143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977.

The product of its digits is 192, while the sum is 17.

The square root of 1242143 is about 1114.5146925905. The cubic root of 1242143 is about 107.4955613815.

Adding to 1242143 its reverse (3412421), we get a palindrome (4654564).

The spelling of 1242143 in words is "one million, two hundred forty-two thousand, one hundred forty-three".