1242320353 has 4 divisors (see below), whose sum is σ = 1271211568. Its totient is φ = 1213429140.

The previous prime is 1242320341. The next prime is 1242320363. The reversal of 1242320353 is 3530232421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1242320353 - 2²⁹ = 705449441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242320363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14445543 + ... + 14445628.

It is an arithmetic number, because the mean of its divisors is an integer number (317802892).

Almost surely, 2^1242320353 is an apocalyptic number.

It is an amenable number.

1242320353 is a deficient number, since it is larger than the sum of its proper divisors (28891215).

1242320353 is an equidigital number, since it uses as much as digits as its factorization.

1242320353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28891214.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 1242320353 is about 35246.5651234273. The cubic root of 1242320353 is about 1075.0067720504.

Adding to 1242320353 its reverse (3530232421), we get a palindrome (4772552774).

The spelling of 1242320353 in words is "one billion, two hundred forty-two million, three hundred twenty thousand, three hundred fifty-three".