1242544345 has 8 divisors (see below), whose sum is σ = 1704060864. Its totient is φ = 852030384.

The previous prime is 1242544339. The next prime is 1242544357. The reversal of 1242544345 is 5434452421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242544345 - 2¹⁹ = 1242020057 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 1242544345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17750599 + ... + 17750668.

It is an arithmetic number, because the mean of its divisors is an integer number (213007608).

Almost surely, 2^1242544345 is an apocalyptic number.

It is an amenable number.

1242544345 is a deficient number, since it is larger than the sum of its proper divisors (461516519).

1242544345 is an equidigital number, since it uses as much as digits as its factorization.

1242544345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35501279.

The product of its digits is 76800, while the sum is 34.

The square root of 1242544345 is about 35249.7424813289. The cubic root of 1242544345 is about 1075.0713765479.

Adding to 1242544345 its reverse (5434452421), we get a palindrome (6676996766).

The spelling of 1242544345 in words is "one billion, two hundred forty-two million, five hundred forty-four thousand, three hundred forty-five".