423578 has 4 divisors (see below), whose sum is σ = 635370. Its totient is φ = 211788.

The previous prime is 423559. The next prime is 423581. The reversal of 423578 is 875324.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 253009 + 170569 = 503^2 + 413^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 423578.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 105893 + ... + 105896.

2⁴²³⁵⁷⁸ is an apocalyptic number.

423578 is a deficient number, since it is larger than the sum of its proper divisors (211792).

423578 is a wasteful number, since it uses less digits than its factorization.

423578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211791.

The product of its digits is 6720, while the sum is 29.

The square root of 423578 is about 650.8287025017. The cubic root of 423578 is about 75.1007830283.

It can be divided in two parts, 423 and 578, that added together give a palindrome (1001).

The spelling of 423578 in words is "four hundred twenty-three thousand, five hundred seventy-eight".