4540243 has 4 divisors (see below), whose sum is σ = 4546368. Its totient is φ = 4534120.

The previous prime is 4540231. The next prime is 4540303. The reversal of 4540243 is 3420454.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4540243 is a prime.

It is a super-2 number, since 2×4540243² = 41227612998098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4543243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1768 + ... + 3493.

It is an arithmetic number, because the mean of its divisors is an integer number (1136592).

Almost surely, 2^4540243 is an apocalyptic number.

4540243 is a deficient number, since it is larger than the sum of its proper divisors (6125).

4540243 is an equidigital number, since it uses as much as digits as its factorization.

4540243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6124.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 4540243 is about 2130.7845972787. The cubic root of 4540243 is about 165.5870487627.

Adding to 4540243 its reverse (3420454), we get a palindrome (7960697).

The spelling of 4540243 in words is "four million, five hundred forty thousand, two hundred forty-three".