1242140943 has 8 divisors (see below), whose sum is σ = 1657707568. Its totient is φ = 827334144.

The previous prime is 1242140929. The next prime is 1242140947. The reversal of 1242140943 is 3490412421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242140943 - 2¹⁶ = 1242075407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242140943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242140947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186130 + ... + 192687.

It is an arithmetic number, because the mean of its divisors is an integer number (207213446).

Almost surely, 2^1242140943 is an apocalyptic number.

1242140943 is a deficient number, since it is larger than the sum of its proper divisors (415566625).

1242140943 is a wasteful number, since it uses less digits than its factorization.

1242140943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379913.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1242140943 is about 35244.0199608387. The cubic root of 1242140943 is about 1074.9550204364.

The spelling of 1242140943 in words is "one billion, two hundred forty-two million, one hundred forty thousand, nine hundred forty-three".