243453 has 8 divisors (see below), whose sum is σ = 371008. Its totient is φ = 139104.

The previous prime is 243437. The next prime is 243461. The reversal of 243453 is 354342.

It is a happy number.

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

It is not a de Polignac number, because 243453 - 2⁴ = 243437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11593 = 243453 / (2 + 4 + 3 + 4 + 5 + 3).

It is a d-powerful number, because it can be written as 2⁵ + 4 + 4⁸ + 3⁶ + 5 + 3¹¹ .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243403) 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, 5776 + ... + 5817.

It is an arithmetic number, because the mean of its divisors is an integer number (46376).

2²⁴³⁴⁵³ is an apocalyptic number.

It is an amenable number.

243453 is a deficient number, since it is larger than the sum of its proper divisors (127555).

243453 is a wasteful number, since it uses less digits than its factorization.

243453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11603.

The product of its digits is 1440, while the sum is 21.

The square root of 243453 is about 493.4095661821. The cubic root of 243453 is about 62.4412674918.

Adding to 243453 its reverse (354342), we get a palindrome (597795).

Subtracting 243453 from its reverse (354342), we obtain a square (110889 = 333²).

It can be divided in two parts, 243 and 453, that added together give a palindrome (696).

The spelling of 243453 in words is "two hundred forty-three thousand, four hundred fifty-three".