143242761 has 16 divisors (see below), whose sum is σ = 195994304. Its totient is φ = 93006144.

The previous prime is 143242753. The next prime is 143242777. The reversal of 143242761 is 167242341.

It is not a de Polignac number, because 143242761 - 2³ = 143242753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143242711) 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 15 ways as a sum of consecutive naturals, for example, 49815 + ... + 52611.

It is an arithmetic number, because the mean of its divisors is an integer number (12249644).

Almost surely, 2^143242761 is an apocalyptic number.

It is an amenable number.

143242761 is a deficient number, since it is larger than the sum of its proper divisors (52751543).

143242761 is a wasteful number, since it uses less digits than its factorization.

143242761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240.

The product of its digits is 8064, while the sum is 30.

The square root of 143242761 is about 11968.4067862017. The cubic root of 143242761 is about 523.2279008760.

The spelling of 143242761 in words is "one hundred forty-three million, two hundred forty-two thousand, seven hundred sixty-one".