1243142 has 8 divisors (see below), whose sum is σ = 1974456. Its totient is φ = 584992.

The previous prime is 1243141. The next prime is 1243147. The reversal of 1243142 is 2413421.

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

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1243142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243141) 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, 18248 + ... + 18315.

It is an arithmetic number, because the mean of its divisors is an integer number (246807).

2^1243142 is an apocalyptic number.

1243142 is a deficient number, since it is larger than the sum of its proper divisors (731314).

1243142 is a wasteful number, since it uses less digits than its factorization.

1243142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36582.

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

The square root of 1243142 is about 1114.9627796478. The cubic root of 1243142 is about 107.5243716150.

Adding to 1243142 its reverse (2413421), we get a palindrome (3656563).

The spelling of 1243142 in words is "one million, two hundred forty-three thousand, one hundred forty-two".