423851 has 4 divisors (see below), whose sum is σ = 433752. Its totient is φ = 413952.

The previous prime is 423847. The next prime is 423853. The reversal of 423851 is 158324.

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 423851 - 2² = 423847 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13 and base 16.

It is not an unprimeable number, because it can be changed into a prime (423853) 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 3 ways as a sum of consecutive naturals, for example, 4886 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (108438).

2⁴²³⁸⁵¹ is an apocalyptic number.

423851 is a deficient number, since it is larger than the sum of its proper divisors (9901).

423851 is an equidigital number, since it uses as much as digits as its factorization.

423851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9900.

The product of its digits is 960, while the sum is 23.

The square root of 423851 is about 651.0384013251. The cubic root of 423851 is about 75.1169139500.

The spelling of 423851 in words is "four hundred twenty-three thousand, eight hundred fifty-one".