99999142 has 8 divisors (see below), whose sum is σ = 150511536. Its totient is φ = 49828632.

The previous prime is 99999131. The next prime is 99999157. The reversal of 99999142 is 24199999.

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

It is a self number, because there is not a number n which added to its sum of digits gives 99999142.

It is a congruent number.

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, 84738 + ... + 85909.

It is an arithmetic number, because the mean of its divisors is an integer number (18813942).

Almost surely, 2^99999142 is an apocalyptic number.

99999142 is a deficient number, since it is larger than the sum of its proper divisors (50512394).

99999142 is a wasteful number, since it uses less digits than its factorization.

99999142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170942.

The product of its digits is 472392, while the sum is 52.

The square root of 99999142 is about 9999.9570999080. The cubic root of 99999142 is about 464.1575558631.

The spelling of 99999142 in words is "ninety-nine million, nine hundred ninety-nine thousand, one hundred forty-two".