426005 has 4 divisors (see below), whose sum is σ = 511212. Its totient is φ = 340800.

The previous prime is 425989. The next prime is 426007. The reversal of 426005 is 500624.

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

It can be written as a sum of positive squares in 2 ways, for example, as 208849 + 217156 = 457^2 + 466^2 .

It is not a de Polignac number, because 426005 - 2⁴ = 425989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 426005.

It is not an unprimeable number, because it can be changed into a prime (426007) 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, 42596 + ... + 42605.

It is an arithmetic number, because the mean of its divisors is an integer number (127803).

2⁴²⁶⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

426005 is a deficient number, since it is larger than the sum of its proper divisors (85207).

426005 is an equidigital number, since it uses as much as digits as its factorization.

426005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85206.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 426005 is about 652.6905851933. The cubic root of 426005 is about 75.2439464157.

Adding to 426005 its reverse (500624), we get a palindrome (926629).

The spelling of 426005 in words is "four hundred twenty-six thousand, five".