143442191 has 8 divisors (see below), whose sum is σ = 157557120. Its totient is φ = 129983832.

The previous prime is 143442181. The next prime is 143442193. The reversal of 143442191 is 191244341.

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 143442191 - 2⁶ = 143442127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143442193) 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 7 ways as a sum of consecutive naturals, for example, 163685 + ... + 164558.

It is an arithmetic number, because the mean of its divisors is an integer number (19694640).

Almost surely, 2^143442191 is an apocalyptic number.

143442191 is a deficient number, since it is larger than the sum of its proper divisors (14114929).

143442191 is a wasteful number, since it uses less digits than its factorization.

143442191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328285.

The product of its digits is 3456, while the sum is 29.

The square root of 143442191 is about 11976.7354066123. The cubic root of 143442191 is about 523.4706099457.

The spelling of 143442191 in words is "one hundred forty-three million, four hundred forty-two thousand, one hundred ninety-one".