1242160043 has 4 divisors (see below), whose sum is σ = 1259176008. Its totient is φ = 1225144080.

The previous prime is 1242160033. The next prime is 1242160069. The reversal of 1242160043 is 3400612421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3400612421 = 523 ⋅6502127.

It is a cyclic number.

It is not a de Polignac number, because 1242160043 - 2⁴ = 1242160027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242160033) 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, 8507873 + ... + 8508018.

It is an arithmetic number, because the mean of its divisors is an integer number (314794002).

Almost surely, 2^1242160043 is an apocalyptic number.

1242160043 is a deficient number, since it is larger than the sum of its proper divisors (17015965).

1242160043 is an equidigital number, since it uses as much as digits as its factorization.

1242160043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17015964.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1242160043 is about 35244.2909277517. The cubic root of 1242160043 is about 1074.9605301535.

Adding to 1242160043 its reverse (3400612421), we get a palindrome (4642772464).

The spelling of 1242160043 in words is "one billion, two hundred forty-two million, one hundred sixty thousand, forty-three".