426645 has 24 divisors (see below), whose sum is σ = 780000. Its totient is φ = 215136.

The previous prime is 426641. The next prime is 426661. The reversal of 426645 is 546624.

It is a happy number.

It is not a de Polignac number, because 426645 - 2² = 426641 is a prime.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 606 + ... + 1104.

It is an arithmetic number, because the mean of its divisors is an integer number (32500).

2⁴²⁶⁶⁴⁵ is an apocalyptic number.

426645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

426645 is a deficient number, since it is larger than the sum of its proper divisors (353355).

426645 is a wasteful number, since it uses less digits than its factorization.

426645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 526 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 426645 is about 653.1806794448. The cubic root of 426645 is about 75.2816079693.

The spelling of 426645 in words is "four hundred twenty-six thousand, six hundred forty-five".