1142542 has 8 divisors (see below), whose sum is σ = 1773000. Its totient is φ = 551544.

The previous prime is 1142539. The next prime is 1142549. The reversal of 1142542 is 2452411.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9792 + ... + 9907.

It is an arithmetic number, because the mean of its divisors is an integer number (221625).

2^1142542 is an apocalyptic number.

1142542 is a deficient number, since it is larger than the sum of its proper divisors (630458).

1142542 is a wasteful number, since it uses less digits than its factorization.

1142542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19730.

The product of its digits is 320, while the sum is 19.

The square root of 1142542 is about 1068.8975629124. The cubic root of 1142542 is about 104.5419807977.

Adding to 1142542 its reverse (2452411), we get a palindrome (3594953).

The spelling of 1142542 in words is "one million, one hundred forty-two thousand, five hundred forty-two".