143140442 has 8 divisors (see below), whose sum is σ = 227340756. Its totient is φ = 67360192.

The previous prime is 143140409. The next prime is 143140447. The reversal of 143140442 is 244041341.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136165561 + 6974881 = 11669^2 + 2641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×143140442² = 40978372271910728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (143140447) 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, 2104973 + ... + 2105040.

Almost surely, 2^143140442 is an apocalyptic number.

143140442 is a deficient number, since it is larger than the sum of its proper divisors (84200314).

143140442 is a wasteful number, since it uses less digits than its factorization.

143140442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210032.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 143140442 is about 11964.1314770442. The cubic root of 143140442 is about 523.1032897908.

Adding to 143140442 its reverse (244041341), we get a palindrome (387181783).

The spelling of 143140442 in words is "one hundred forty-three million, one hundred forty thousand, four hundred forty-two".