143242109 has 4 divisors (see below), whose sum is σ = 143857116. Its totient is φ = 142627104.

The previous prime is 143242087. The next prime is 143242111. The reversal of 143242109 is 901242341.

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

It can be written as a sum of positive squares in 2 ways, for example, as 94284100 + 48958009 = 9710^2 + 6997^2 .

It is a cyclic number.

It is not a de Polignac number, because 143242109 - 2¹² = 143238013 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 (143242709) 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, 307154 + ... + 307619.

It is an arithmetic number, because the mean of its divisors is an integer number (35964279).

Almost surely, 2^143242109 is an apocalyptic number.

It is an amenable number.

143242109 is a deficient number, since it is larger than the sum of its proper divisors (615007).

143242109 is an equidigital number, since it uses as much as digits as its factorization.

143242109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615006.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 143242109 is about 11968.3795477918. The cubic root of 143242109 is about 523.2271070137.

The spelling of 143242109 in words is "one hundred forty-three million, two hundred forty-two thousand, one hundred nine".