421589 has 8 divisors (see below), whose sum is σ = 485760. Its totient is φ = 358416.

The previous prime is 421559. The next prime is 421607. The reversal of 421589 is 985124.

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

It is a cyclic number.

It is not a de Polignac number, because 421589 - 2¹² = 417493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1472 + ... + 1734.

It is an arithmetic number, because the mean of its divisors is an integer number (60720).

2⁴²¹⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

421589 is a deficient number, since it is larger than the sum of its proper divisors (64171).

421589 is a wasteful number, since it uses less digits than its factorization.

421589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499.

The product of its digits is 2880, while the sum is 29.

The square root of 421589 is about 649.2988526095. The cubic root of 421589 is about 74.9830480205.

The spelling of 421589 in words is "four hundred twenty-one thousand, five hundred eighty-nine".