1143742 has 4 divisors (see below), whose sum is σ = 1715616. Its totient is φ = 571870.

The previous prime is 1143719. The next prime is 1143749. The reversal of 1143742 is 2473411.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285934 + ... + 285937.

It is an arithmetic number, because the mean of its divisors is an integer number (428904).

2^1143742 is an apocalyptic number.

1143742 is a deficient number, since it is larger than the sum of its proper divisors (571874).

1143742 is an equidigital number, since it uses as much as digits as its factorization.

1143742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571873.

The product of its digits is 672, while the sum is 22.

The square root of 1143742 is about 1069.4587416072. The cubic root of 1143742 is about 104.5785677774.

The spelling of 1143742 in words is "one million, one hundred forty-three thousand, seven hundred forty-two".