424181 has 4 divisors (see below), whose sum is σ = 428652. Its totient is φ = 419712.

The previous prime is 424169. The next prime is 424187. The reversal of 424181 is 181424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 217156 + 207025 = 466^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 424181 - 2⁶ = 424117 is a prime.

It is a super-2 number, since 2×424181² = 359859041522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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 424181.

It is not an unprimeable number, because it can be changed into a prime (424187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090 + ... + 2283.

It is an arithmetic number, because the mean of its divisors is an integer number (107163).

2⁴²⁴¹⁸¹ is an apocalyptic number.

It is an amenable number.

424181 is a deficient number, since it is larger than the sum of its proper divisors (4471).

424181 is an equidigital number, since it uses as much as digits as its factorization.

424181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470.

The product of its digits is 256, while the sum is 20.

The square root of 424181 is about 651.2917932847. The cubic root of 424181 is about 75.1364036221.

The spelling of 424181 in words is "four hundred twenty-four thousand, one hundred eighty-one".