423556 has 18 divisors (see below), whose sum is σ = 862638. Its totient is φ = 181440.

The previous prime is 423547. The next prime is 423557. The reversal of 423556 is 655324.

It can be written as a sum of positive squares in only one way, i.e., 379456 + 44100 = 616^2 + 210^2 .

It is a zygodrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 423556.

It is not an unprimeable number, because it can be changed into a prime (423557) by changing a digit.

423556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 885 + ... + 1276.

2⁴²³⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

423556 is an abundant number, since it is smaller than the sum of its proper divisors (439082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423556 is a wasteful number, since it uses less digits than its factorization.

423556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179 (or 2170 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 423556 is about 650.8118007535. The cubic root of 423556 is about 75.0994827988.

It can be divided in two parts, 423 and 556, that added together give a palindrome (979).

The spelling of 423556 in words is "four hundred twenty-three thousand, five hundred fifty-six".