42998 has 4 divisors (see below), whose sum is σ = 64500. Its totient is φ = 21498.

The previous prime is 42989. The next prime is 43003. The reversal of 42998 is 89924.

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

It is a congruent number.

It is an unprimeable number.

42998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 10748 + ... + 10751.

It is an arithmetic number, because the mean of its divisors is an integer number (16125).

2⁴²⁹⁹⁸ is an apocalyptic number.

42998 is a deficient number, since it is larger than the sum of its proper divisors (21502).

42998 is a wasteful number, since it uses less digits than its factorization.

42998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21501.

The product of its digits is 5184, while the sum is 32.

The square root of 42998 is about 207.3595910490. The cubic root of 42998 is about 35.0334374330.

The spelling of 42998 in words is "forty-two thousand, nine hundred ninety-eight".