1123420442 has 4 divisors (see below), whose sum is σ = 1685130666. Its totient is φ = 561710220.

The previous prime is 1123420427. The next prime is 1123420447. The reversal of 1123420442 is 2440243211.

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., 1090254361 + 33166081 = 33019^2 + 5759^2 .

It is not an unprimeable number, because it can be changed into a prime (1123420447) 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 as a sum of consecutive naturals, namely, 280855109 + ... + 280855112.

Almost surely, 2^1123420442 is an apocalyptic number.

1123420442 is a deficient number, since it is larger than the sum of its proper divisors (561710224).

1123420442 is an equidigital number, since it uses as much as digits as its factorization.

1123420442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561710223.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1123420442 is about 33517.4647310921. The cubic root of 1123420442 is about 1039.5549260493.

Adding to 1123420442 its reverse (2440243211), we get a palindrome (3563663653).

The spelling of 1123420442 in words is "one billion, one hundred twenty-three million, four hundred twenty thousand, four hundred forty-two".