42026 has 4 divisors (see below), whose sum is σ = 63042. Its totient is φ = 21012.

The previous prime is 42023. The next prime is 42043. The reversal of 42026 is 62024.

It is a Cunningham number, because it is equal to 205²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 42025 + 1 = 205^2 + 1^2 .

It is a Curzon number.

It is a plaindrome in base 7 and base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 42026.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42026.

It is not an unprimeable number, because it can be changed into a prime (42023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505 + ... + 10508.

2⁴²⁰²⁶ is an apocalyptic number.

42026 is a deficient number, since it is larger than the sum of its proper divisors (21016).

42026 is a wasteful number, since it uses less digits than its factorization.

42026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21015.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 42026 is about 205.0024390099. The cubic root of 42026 is about 34.7674377227.

The spelling of 42026 in words is "forty-two thousand, twenty-six".