1243457242 has 8 divisors (see below), whose sum is σ = 1963353600. Its totient is φ = 589006044.

The previous prime is 1243457233. The next prime is 1243457249. The reversal of 1243457242 is 2427543421.

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

It is a junction number, because it is equal to n+sod(n) for n = 1243457198 and 1243457207.

It is not an unprimeable number, because it can be changed into a prime (1243457249) 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, 16361242 + ... + 16361317.

It is an arithmetic number, because the mean of its divisors is an integer number (245419200).

Almost surely, 2^1243457242 is an apocalyptic number.

1243457242 is a deficient number, since it is larger than the sum of its proper divisors (719896358).

1243457242 is a wasteful number, since it uses less digits than its factorization.

1243457242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32722580.

The product of its digits is 53760, while the sum is 34.

The square root of 1243457242 is about 35262.6890920134. The cubic root of 1243457242 is about 1075.3345969806.

The spelling of 1243457242 in words is "one billion, two hundred forty-three million, four hundred fifty-seven thousand, two hundred forty-two".