142999999 has 4 divisors (see below), whose sum is σ = 143171280. Its totient is φ = 142828720.

The previous prime is 142999979. The next prime is 143000017. The reversal of 142999999 is 999999241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142999999 - 2¹⁷ = 142868927 is a prime.

It is a Duffinian number.

142999999 is a modest number, since divided by 99999 gives 1429 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142999939) 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, 84382 + ... + 86059.

It is an arithmetic number, because the mean of its divisors is an integer number (35792820).

Almost surely, 2^142999999 is an apocalyptic number.

142999999 is a deficient number, since it is larger than the sum of its proper divisors (171281).

142999999 is an equidigital number, since it uses as much as digits as its factorization.

142999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171280.

The product of its digits is 4251528, while the sum is 61.

The square root of 142999999 is about 11958.2607012893. The cubic root of 142999999 is about 522.9321519566.

The spelling of 142999999 in words is "one hundred forty-two million, nine hundred ninety-nine thousand, nine hundred ninety-nine".