75243 has 8 divisors (see below), whose sum is σ = 114688. Its totient is φ = 42984.

The previous prime is 75239. The next prime is 75253. The reversal of 75243 is 34257.

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 75243 - 2² = 75239 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: 3583 = 75243 / (7 + 5 + 2 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (75223) 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, 1771 + ... + 1812.

It is an arithmetic number, because the mean of its divisors is an integer number (14336).

2⁷⁵²⁴³ is an apocalyptic number.

75243 is a deficient number, since it is larger than the sum of its proper divisors (39445).

75243 is a wasteful number, since it uses less digits than its factorization.

75243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593.

The product of its digits is 840, while the sum is 21.

The square root of 75243 is about 274.3045752444. The cubic root of 75243 is about 42.2171295284.

It can be divided in two parts, 75 and 243, that multiplied together give a square (18225 = 135²).

The spelling of 75243 in words is "seventy-five thousand, two hundred forty-three".