423861 has 8 divisors (see below), whose sum is σ = 598464. Its totient is φ = 265920.

The previous prime is 423859. The next prime is 423869. The reversal of 423861 is 168324.

423861 = 213² + 214² + ... + 221².

It is a happy number.

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

It is not a de Polignac number, because 423861 - 2¹ = 423859 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4105 + ... + 4206.

It is an arithmetic number, because the mean of its divisors is an integer number (74808).

2⁴²³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

423861 is a deficient number, since it is larger than the sum of its proper divisors (174603).

423861 is a wasteful number, since it uses less digits than its factorization.

423861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331.

The product of its digits is 1152, while the sum is 24.

The square root of 423861 is about 651.0460813184. The cubic root of 423861 is about 75.1175046947.

The spelling of 423861 in words is "four hundred twenty-three thousand, eight hundred sixty-one".