42874 has 16 divisors (see below), whose sum is σ = 74088. Its totient is φ = 18432.

The previous prime is 42863. The next prime is 42899. The reversal of 42874 is 47824.

42874 is nontrivially palindromic in base 16.

It is a Cunningham number, because it is equal to 35³-1.

It can be written as a sum of positive squares in 4 ways, for example, as 34225 + 8649 = 185^2 + 93^2 .

It is a plaindrome in base 7.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394 + ... + 490.

2⁴²⁸⁷⁴ is an apocalyptic number.

42874 is a deficient number, since it is larger than the sum of its proper divisors (31214).

42874 is a wasteful number, since it uses less digits than its factorization.

42874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129.

The product of its digits is 1792, while the sum is 25.

The square root of 42874 is about 207.0603776680. The cubic root of 42874 is about 34.9997278890. Note that the first 3 decimals are identical.

Subtracting from 42874 its sum of digits (25), we obtain a square (42849 = 207²).

Subtracting 42874 from its reverse (47824), we obtain a triangular number (4950 = T₉₉).

The spelling of 42874 in words is "forty-two thousand, eight hundred seventy-four".