8426 has 8 divisors (see below), whose sum is σ = 13824. Its totient is φ = 3820.

The previous prime is 8423. The next prime is 8429. The reversal of 8426 is 6248.

8426 = T₄ + T₅ + ... + T₃₆.

It is an interprime number because it is at equal distance from previous prime (8423) and next prime (8429).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8398 and 8407.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 8426.

It is not an unprimeable number, because it can be changed into a prime (8423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170 + ... + 213.

It is an arithmetic number, because the mean of its divisors is an integer number (1728).

2⁸⁴²⁶ is an apocalyptic number.

8426 is a deficient number, since it is larger than the sum of its proper divisors (5398).

8426 is a wasteful number, since it uses less digits than its factorization.

8426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396.

The product of its digits is 384, while the sum is 20.

The square root of 8426 is about 91.7932459389. The cubic root of 8426 is about 20.3488787925.

It can be divided in two parts, 842 and 6, that added together give a palindrome (848).

The spelling of 8426 in words is "eight thousand, four hundred twenty-six".