501426 has 24 divisors (see below), whose sum is σ = 1102140. Its totient is φ = 164736.

The previous prime is 501419. The next prime is 501427. The reversal of 501426 is 624105.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 378225 + 123201 = 615^2 + 351^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 501399 and 501408.

It is not an unprimeable number, because it can be changed into a prime (501427) by changing a digit.

501426 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 in 11 ways as a sum of consecutive naturals, for example, 1446 + ... + 1758.

2⁵⁰¹⁴²⁶ is an apocalyptic number.

501426 is an abundant number, since it is smaller than the sum of its proper divisors (600714).

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

501426 is a wasteful number, since it uses less digits than its factorization.

501426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 501426 is about 708.1143975376. The cubic root of 501426 is about 79.4454354431.

The spelling of 501426 in words is "five hundred one thousand, four hundred twenty-six".