42426 has 12 divisors (see below), whose sum is σ = 91962.
Its totient is φ = 14136.
The previous prime is 42409. The next prime is 42433. The reversal of 42426 is 62424.
It can be divided in two parts, 4242 and 6, that multiplied together give a palindrome (25452).
It can be written as a sum of positive squares in only one way, i.e., 40401 + 2025 = 201^2 + 45^2
It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2357 = 42426 / (4 + 2 + 4 + 2 + 6).
It is a plaindrome in base 7 and base 14.
It is a nialpdrome in base 15.
It is a zygodrome in base 14.
It is a junction number, because it is equal to n+sod(n) for n = 42399 and 42408.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42426.
It is an unprimeable number.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1161 + ... + 1196.
242426 is an apocalyptic number.
42426 is an abundant number, since it is smaller than the sum of its proper divisors (49536).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
42426 is a wasteful number, since it uses less digits than its factorization.
42426 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2365 (or 2362 counting only the distinct ones).
The product of its digits is 384, while the sum is 18.
The square root of 42426 is about 205.9757267253.
The cubic root of 42426 is about 34.8773941394.
The spelling of 42426 in words is "forty-two thousand, four hundred twenty-six".