143442247 has 4 divisors (see below), whose sum is σ = 154476280. Its totient is φ = 132408216.

The previous prime is 143442227. The next prime is 143442251. The reversal of 143442247 is 742244341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742244341 = 107 ⋅6936863.

It is a cyclic number.

It is not a de Polignac number, because 143442247 - 2¹⁵ = 143409479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143442227) 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, 5516997 + ... + 5517022.

It is an arithmetic number, because the mean of its divisors is an integer number (38619070).

Almost surely, 2^143442247 is an apocalyptic number.

143442247 is a deficient number, since it is larger than the sum of its proper divisors (11034033).

143442247 is a wasteful number, since it uses less digits than its factorization.

143442247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11034032.

The product of its digits is 21504, while the sum is 31.

The square root of 143442247 is about 11976.7377444778. The cubic root of 143442247 is about 523.4706780669.

Adding to 143442247 its reverse (742244341), we get a palindrome (885686588).

It can be divided in two parts, 1434 and 42247, that added together give a square (43681 = 209²).

The spelling of 143442247 in words is "one hundred forty-three million, four hundred forty-two thousand, two hundred forty-seven".