142643434 has 4 divisors (see below), whose sum is σ = 213965154. Its totient is φ = 71321716.

The previous prime is 142643381. The next prime is 142643461. The reversal of 142643434 is 434346241.

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., 97713225 + 44930209 = 9885^2 + 6703^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 142643396 and 142643405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35660857 + ... + 35660860.

Almost surely, 2^142643434 is an apocalyptic number.

142643434 is a deficient number, since it is larger than the sum of its proper divisors (71321720).

142643434 is an equidigital number, since it uses as much as digits as its factorization.

142643434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71321719.

The product of its digits is 27648, while the sum is 31.

The square root of 142643434 is about 11943.3426644303. The cubic root of 142643434 is about 522.4971531327.

Adding to 142643434 its reverse (434346241), we get a palindrome (576989675).

The spelling of 142643434 in words is "one hundred forty-two million, six hundred forty-three thousand, four hundred thirty-four".