424781 has 6 divisors (see below), whose sum is σ = 494190. Its totient is φ = 364056.

The previous prime is 424777. The next prime is 424811. The reversal of 424781 is 187424.

It can be written as a sum of positive squares in only one way, i.e., 354025 + 70756 = 595^2 + 266^2 .

It is not a de Polignac number, because 424781 - 2² = 424777 is a prime.

It is a super-2 number, since 2×424781² = 360877795922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 424781.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 424781.

It is not an unprimeable number, because it can be changed into a prime (424771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4286 + ... + 4383.

It is an arithmetic number, because the mean of its divisors is an integer number (82365).

2⁴²⁴⁷⁸¹ is an apocalyptic number.

It is an amenable number.

424781 is a deficient number, since it is larger than the sum of its proper divisors (69409).

424781 is an equidigital number, since it uses as much as digits as its factorization.

424781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683 (or 8676 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 424781 is about 651.7522535442. The cubic root of 424781 is about 75.1718135084.

The spelling of 424781 in words is "four hundred twenty-four thousand, seven hundred eighty-one".