72423 has 12 divisors (see below), whose sum is σ = 112840. Its totient is φ = 44496.

The previous prime is 72421. The next prime is 72431. The reversal of 72423 is 32427.

It is a happy number.

It is not a de Polignac number, because 72423 - 2¹ = 72421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72396 and 72405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193 + ... + 426.

2⁷²⁴²³ is an apocalyptic number.

72423 is a deficient number, since it is larger than the sum of its proper divisors (40417).

72423 is a wasteful number, since it uses less digits than its factorization.

72423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 635 counting only the distinct ones).

The product of its digits is 336, while the sum is 18.

The square root of 72423 is about 269.1152169611. The cubic root of 72423 is about 41.6829873842.

It can be divided in two parts, 724 and 23, that added together give a palindrome (747).

The spelling of 72423 in words is "seventy-two thousand, four hundred twenty-three", and thus it is an iban number.