424391 has 8 divisors (see below), whose sum is σ = 474768. Its totient is φ = 376000.

The previous prime is 424351. The next prime is 424397. The reversal of 424391 is 193424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424391 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20 + ... + 921.

It is an arithmetic number, because the mean of its divisors is an integer number (59346).

2⁴²⁴³⁹¹ is an apocalyptic number.

424391 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

424391 is a deficient number, since it is larger than the sum of its proper divisors (50377).

424391 is a wasteful number, since it uses less digits than its factorization.

424391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993.

The product of its digits is 864, while the sum is 23.

The square root of 424391 is about 651.4529913969. The cubic root of 424391 is about 75.1488008784.

It can be divided in two parts, 4243 and 91, that added together give a palindrome (4334).

The spelling of 424391 in words is "four hundred twenty-four thousand, three hundred ninety-one".