424643 has 4 divisors (see below), whose sum is σ = 449640. Its totient is φ = 399648.

The previous prime is 424639. The next prime is 424661. The reversal of 424643 is 346424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 424643 - 2² = 424639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12473 + ... + 12506.

It is an arithmetic number, because the mean of its divisors is an integer number (112410).

2⁴²⁴⁶⁴³ is an apocalyptic number.

424643 is a deficient number, since it is larger than the sum of its proper divisors (24997).

424643 is a wasteful number, since it uses less digits than its factorization.

424643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24996.

The product of its digits is 2304, while the sum is 23.

The square root of 424643 is about 651.6463764957. The cubic root of 424643 is about 75.1636721887.

The spelling of 424643 in words is "four hundred twenty-four thousand, six hundred forty-three".