42494 has 4 divisors (see below), whose sum is σ = 63744. Its totient is φ = 21246.

The previous prime is 42491. The next prime is 42499. The reversal of 42494 is 49424.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42491) 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 as a sum of consecutive naturals, namely, 10622 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (15936).

2⁴²⁴⁹⁴ is an apocalyptic number.

42494 is a deficient number, since it is larger than the sum of its proper divisors (21250).

42494 is a wasteful number, since it uses less digits than its factorization.

42494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21249.

The product of its digits is 1152, while the sum is 23.

The square root of 42494 is about 206.1407286297. The cubic root of 42494 is about 34.8960179144.

The spelling of 42494 in words is "forty-two thousand, four hundred ninety-four".