42974 has 4 divisors (see below), whose sum is σ = 64464. Its totient is φ = 21486.

The previous prime is 42967. The next prime is 42979. The reversal of 42974 is 47924.

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

It is a plaindrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42979) 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, 10742 + ... + 10745.

It is an arithmetic number, because the mean of its divisors is an integer number (16116).

2⁴²⁹⁷⁴ is an apocalyptic number.

42974 is a deficient number, since it is larger than the sum of its proper divisors (21490).

42974 is a wasteful number, since it uses less digits than its factorization.

42974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21489.

The product of its digits is 2016, while the sum is 26.

The square root of 42974 is about 207.3017124869. The cubic root of 42974 is about 35.0269180678.

Subtracting 42974 from its reverse (47924), we obtain a triangular number (4950 = T₉₉).

The spelling of 42974 in words is "forty-two thousand, nine hundred seventy-four".