426445 has 16 divisors (see below), whose sum is σ = 563760. Its totient is φ = 308224.

The previous prime is 426427. The next prime is 426469. The reversal of 426445 is 544624.

It can be written as a sum of positive squares in 8 ways, for example, as 44521 + 381924 = 211^2 + 618^2 .

It is a cyclic number.

It is not a de Polignac number, because 426445 - 2¹¹ = 424397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2379 + ... + 2551.

It is an arithmetic number, because the mean of its divisors is an integer number (35235).

2⁴²⁶⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

426445 is a deficient number, since it is larger than the sum of its proper divisors (137315).

426445 is a wasteful number, since it uses less digits than its factorization.

426445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its digits is 3840, while the sum is 25.

The square root of 426445 is about 653.0275645024. The cubic root of 426445 is about 75.2698427821.

The spelling of 426445 in words is "four hundred twenty-six thousand, four hundred forty-five".