505426 has 4 divisors (see below), whose sum is σ = 758142. Its totient is φ = 252712.

The previous prime is 505411. The next prime is 505429. The reversal of 505426 is 624505.

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., 416025 + 89401 = 645^2 + 299^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 505397 and 505406.

It is not an unprimeable number, because it can be changed into a prime (505429) by changing a digit.

505426 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 126355 + ... + 126358.

2⁵⁰⁵⁴²⁶ is an apocalyptic number.

505426 is a deficient number, since it is larger than the sum of its proper divisors (252716).

505426 is a wasteful number, since it uses less digits than its factorization.

505426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252715.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 505426 is about 710.9331895474. The cubic root of 505426 is about 79.6561281867.

It can be divided in two parts, 50 and 5426, that added together give a square (5476 = 74²).

The spelling of 505426 in words is "five hundred five thousand, four hundred twenty-six".