42142999 has 4 divisors (see below), whose sum is σ = 42167664. Its totient is φ = 42118336.

The previous prime is 42142987. The next prime is 42143027. The reversal of 42142999 is 99924124.

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 42142999 - 2⁷ = 42142871 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42142909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9562 + ... + 13255.

It is an arithmetic number, because the mean of its divisors is an integer number (10541916).

Almost surely, 2^42142999 is an apocalyptic number.

42142999 is a deficient number, since it is larger than the sum of its proper divisors (24665).

42142999 is a wasteful number, since it uses less digits than its factorization.

42142999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24664.

The product of its digits is 46656, while the sum is 40.

The square root of 42142999 is about 6491.7639359422. The cubic root of 42142999 is about 347.9967162900.

The spelling of 42142999 in words is "forty-two million, one hundred forty-two thousand, nine hundred ninety-nine".