424405 has 8 divisors (see below), whose sum is σ = 539352. Its totient is φ = 319488.

The previous prime is 424397. The next prime is 424423. The reversal of 424405 is 504424.

It can be written as a sum of positive squares in 4 ways, for example, as 62001 + 362404 = 249^2 + 602^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 424405 - 2³ = 424397 is a prime.

It is an Ulam number.

It is a Duffinian number.

424405 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2412 + ... + 2581.

It is an arithmetic number, because the mean of its divisors is an integer number (67419).

2⁴²⁴⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

424405 is a deficient number, since it is larger than the sum of its proper divisors (114947).

424405 is a wasteful number, since it uses less digits than its factorization.

424405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5015.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 424405 is about 651.4637365195. The cubic root of 424405 is about 75.1496272167.

Adding to 424405 its sum of digits (19), we get a palindrome (424424).

Adding to 424405 its reverse (504424), we get a palindrome (928829).

The spelling of 424405 in words is "four hundred twenty-four thousand, four hundred five".