1242388273 has 8 divisors (see below), whose sum is σ = 1454503680. Its totient is φ = 1038930720.

The previous prime is 1242388267. The next prime is 1242388297. The reversal of 1242388273 is 3728832421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242388273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242388223) 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, 2164153 + ... + 2164726.

It is an arithmetic number, because the mean of its divisors is an integer number (181812960).

Almost surely, 2^1242388273 is an apocalyptic number.

It is an amenable number.

1242388273 is a deficient number, since it is larger than the sum of its proper divisors (212115407).

1242388273 is an equidigital number, since it uses as much as digits as its factorization.

1242388273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328927.

The product of its digits is 129024, while the sum is 40.

The square root of 1242388273 is about 35247.5286084003. The cubic root of 1242388273 is about 1075.0263625769.

The spelling of 1242388273 in words is "one billion, two hundred forty-two million, three hundred eighty-eight thousand, two hundred seventy-three".