1242311242 has 4 divisors (see below), whose sum is σ = 1863466866. Its totient is φ = 621155620.

The previous prime is 1242311221. The next prime is 1242311269. The reversal of 1242311242 is 2421132421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1241928081 + 383161 = 35241^2 + 619^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310577809 + ... + 310577812.

Almost surely, 2^1242311242 is an apocalyptic number.

1242311242 is a deficient number, since it is larger than the sum of its proper divisors (621155624).

1242311242 is an equidigital number, since it uses as much as digits as its factorization.

1242311242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621155623.

The product of its digits is 768, while the sum is 22.

The square root of 1242311242 is about 35246.4358765535. The cubic root of 1242311242 is about 1075.0041440619.

Adding to 1242311242 its reverse (2421132421), we get a palindrome (3663443663).

The spelling of 1242311242 in words is "one billion, two hundred forty-two million, three hundred eleven thousand, two hundred forty-two".