1243535042 has 8 divisors (see below), whose sum is σ = 1867352832. Its totient is φ = 621084100.

The previous prime is 1243535021. The next prime is 1243535087. The reversal of 1243535042 is 2405353421.

It is a happy number.

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 = 1243534996 and 1243535014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339434 + ... + 343077.

It is an arithmetic number, because the mean of its divisors is an integer number (233419104).

Almost surely, 2^1243535042 is an apocalyptic number.

1243535042 is a deficient number, since it is larger than the sum of its proper divisors (623817790).

1243535042 is an equidigital number, since it uses as much as digits as its factorization.

1243535042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683424.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 1243535042 is about 35263.7922237527. The cubic root of 1243535042 is about 1075.3570235089.

Adding to 1243535042 its reverse (2405353421), we get a palindrome (3648888463).

The spelling of 1243535042 in words is "one billion, two hundred forty-three million, five hundred thirty-five thousand, forty-two".