143321242 has 4 divisors (see below), whose sum is σ = 214981866. Its totient is φ = 71660620.

The previous prime is 143321231. The next prime is 143321261. The reversal of 143321242 is 242123341.

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

It can be written as a sum of positive squares in only one way, i.e., 126090441 + 17230801 = 11229^2 + 4151^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35830309 + ... + 35830312.

Almost surely, 2^143321242 is an apocalyptic number.

143321242 is a deficient number, since it is larger than the sum of its proper divisors (71660624).

143321242 is an equidigital number, since it uses as much as digits as its factorization.

143321242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71660623.

The product of its digits is 1152, while the sum is 22.

The square root of 143321242 is about 11971.6850108913. The cubic root of 143321242 is about 523.3234402050.

Adding to 143321242 its reverse (242123341), we get a palindrome (385444583).

The spelling of 143321242 in words is "one hundred forty-three million, three hundred twenty-one thousand, two hundred forty-two".