1224540043 has 4 divisors (see below), whose sum is σ = 1224790000. Its totient is φ = 1224290088.

The previous prime is 1224540019. The next prime is 1224540061. The reversal of 1224540043 is 3400454221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3400454221 = 409 ⋅8314069.

It is a cyclic number.

It is not a de Polignac number, because 1224540043 - 2⁵ = 1224540011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224540013) 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, 117480 + ... + 127477.

It is an arithmetic number, because the mean of its divisors is an integer number (306197500).

Almost surely, 2^1224540043 is an apocalyptic number.

1224540043 is a deficient number, since it is larger than the sum of its proper divisors (249957).

1224540043 is an equidigital number, since it uses as much as digits as its factorization.

1224540043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249956.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1224540043 is about 34993.4285688042. The cubic root of 1224540043 is about 1069.8535459145.

Adding to 1224540043 its reverse (3400454221), we get a palindrome (4624994264).

The spelling of 1224540043 in words is "one billion, two hundred twenty-four million, five hundred forty thousand, forty-three".