142999138 has 8 divisors (see below), whose sum is σ = 227116332. Its totient is φ = 67293696.

The previous prime is 142999097. The next prime is 142999147. The reversal of 142999138 is 831999241.

It is a happy number.

142999138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 129800449 + 13198689 = 11393^2 + 3633^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2102895 + ... + 2102962.

Almost surely, 2^142999138 is an apocalyptic number.

142999138 is a deficient number, since it is larger than the sum of its proper divisors (84117194).

142999138 is a wasteful number, since it uses less digits than its factorization.

142999138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4205876.

The product of its digits is 139968, while the sum is 46.

The square root of 142999138 is about 11958.2247010165. The cubic root of 142999138 is about 522.9311024334.

The spelling of 142999138 in words is "one hundred forty-two million, nine hundred ninety-nine thousand, one hundred thirty-eight".