142508642 has 4 divisors (see below), whose sum is σ = 213762966. Its totient is φ = 71254320.

The previous prime is 142508599. The next prime is 142508647. The reversal of 142508642 is 246805241.

142508642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246805241 = 3001 ⋅82241.

It can be written as a sum of positive squares in only one way, i.e., 105042001 + 37466641 = 10249^2 + 6121^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142508599 and 142508608.

It is not an unprimeable number, because it can be changed into a prime (142508647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35627159 + ... + 35627162.

Almost surely, 2^142508642 is an apocalyptic number.

142508642 is a deficient number, since it is larger than the sum of its proper divisors (71254324).

142508642 is an equidigital number, since it uses as much as digits as its factorization.

142508642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71254323.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 142508642 is about 11937.6983543730. The cubic root of 142508642 is about 522.3325220431.

The spelling of 142508642 in words is "one hundred forty-two million, five hundred eight thousand, six hundred forty-two".