201423 has 4 divisors (see below), whose sum is σ = 268568. Its totient is φ = 134280.

The previous prime is 201413. The next prime is 201437. The reversal of 201423 is 324102.

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

It is not a de Polignac number, because 201423 - 2⁶ = 201359 is a prime.

It is a D-number.

It is a Duffinian number.

201423 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 201399 and 201408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201403) 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, 33568 + ... + 33573.

It is an arithmetic number, because the mean of its divisors is an integer number (67142).

2²⁰¹⁴²³ is an apocalyptic number.

201423 is a deficient number, since it is larger than the sum of its proper divisors (67145).

201423 is an equidigital number, since it uses as much as digits as its factorization.

201423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67144.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 201423 is about 448.8017379645. The cubic root of 201423 is about 58.6187230259.

Adding to 201423 its reverse (324102), we get a palindrome (525525).

The spelling of 201423 in words is "two hundred one thousand, four hundred twenty-three", and thus it is an iban number.