1242124043 has 4 divisors (see below), whose sum is σ = 1242820920. Its totient is φ = 1241427168.

The previous prime is 1242124021. The next prime is 1242124067. The reversal of 1242124043 is 3404212421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242124043 - 2⁶ = 1242123979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242120043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345758 + ... + 349331.

It is an arithmetic number, because the mean of its divisors is an integer number (310705230).

Almost surely, 2^1242124043 is an apocalyptic number.

1242124043 is a deficient number, since it is larger than the sum of its proper divisors (696877).

1242124043 is an equidigital number, since it uses as much as digits as its factorization.

1242124043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696876.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1242124043 is about 35243.7802030372. The cubic root of 1242124043 is about 1074.9501452993.

Adding to 1242124043 its reverse (3404212421), we get a palindrome (4646336464).

The spelling of 1242124043 in words is "one billion, two hundred forty-two million, one hundred twenty-four thousand, forty-three".