423161 has 4 divisors (see below), whose sum is σ = 433524. Its totient is φ = 412800.

The previous prime is 423133. The next prime is 423173. The reversal of 423161 is 161324.

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 109561 + 313600 = 331^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 423161 - 2⁶ = 423097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (423121) 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, 5120 + ... + 5201.

It is an arithmetic number, because the mean of its divisors is an integer number (108381).

2⁴²³¹⁶¹ is an apocalyptic number.

423161 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

423161 is a deficient number, since it is larger than the sum of its proper divisors (10363).

423161 is a wasteful number, since it uses less digits than its factorization.

423161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10362.

The product of its digits is 144, while the sum is 17.

The square root of 423161 is about 650.5082628222. The cubic root of 423161 is about 75.0761301040.

Adding to 423161 its reverse (161324), we get a palindrome (584485).

The spelling of 423161 in words is "four hundred twenty-three thousand, one hundred sixty-one".