1242070943 has 4 divisors (see below), whose sum is σ = 1257793440. Its totient is φ = 1226348448.

The previous prime is 1242070939. The next prime is 1242070961. The reversal of 1242070943 is 3490702421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3490702421 = 29 ⋅120369049.

It is a cyclic number.

It is not a de Polignac number, because 1242070943 - 2² = 1242070939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242070043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7861130 + ... + 7861287.

It is an arithmetic number, because the mean of its divisors is an integer number (314448360).

Almost surely, 2^1242070943 is an apocalyptic number.

1242070943 is a deficient number, since it is larger than the sum of its proper divisors (15722497).

1242070943 is an equidigital number, since it uses as much as digits as its factorization.

1242070943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15722496.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1242070943 is about 35243.0268705740. The cubic root of 1242070943 is about 1074.9348272730.

The spelling of 1242070943 in words is "one billion, two hundred forty-two million, seventy thousand, nine hundred forty-three".