143644642 has 8 divisors (see below), whose sum is σ = 216913500. Its totient is φ = 71340144.

The previous prime is 143644609. The next prime is 143644649. The reversal of 143644642 is 246446341.

It can be written as a sum of positive squares in 2 ways, for example, as 143065521 + 579121 = 11961^2 + 761^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 143644598 and 143644607.

It is not an unprimeable number, because it can be changed into a prime (143644649) 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, 240717 + ... + 241312.

Almost surely, 2^143644642 is an apocalyptic number.

143644642 is a deficient number, since it is larger than the sum of its proper divisors (73268858).

143644642 is a wasteful number, since it uses less digits than its factorization.

143644642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482180.

The product of its digits is 55296, while the sum is 34.

The square root of 143644642 is about 11985.1842705901. The cubic root of 143644642 is about 523.7167656243.

The spelling of 143644642 in words is "one hundred forty-three million, six hundred forty-four thousand, six hundred forty-two".