1115121242 has 4 divisors (see below), whose sum is σ = 1672681866. Its totient is φ = 557560620.

The previous prime is 1115121197. The next prime is 1115121263. The reversal of 1115121242 is 2421215111.

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., 1110955561 + 4165681 = 33331^2 + 2041^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278780309 + ... + 278780312.

Almost surely, 2^1115121242 is an apocalyptic number.

1115121242 is a deficient number, since it is larger than the sum of its proper divisors (557560624).

1115121242 is an equidigital number, since it uses as much as digits as its factorization.

1115121242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557560623.

The product of its digits is 160, while the sum is 20.

The square root of 1115121242 is about 33393.4311205063. The cubic root of 1115121242 is about 1036.9887135187.

Adding to 1115121242 its reverse (2421215111), we get a palindrome (3536336353).

The spelling of 1115121242 in words is "one billion, one hundred fifteen million, one hundred twenty-one thousand, two hundred forty-two".