1123554442 has 4 divisors (see below), whose sum is σ = 1685331666. Its totient is φ = 561777220.

The previous prime is 1123554437. The next prime is 1123554449. The reversal of 1123554442 is 2444553211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2444553211 = 13109 ⋅186479.

It can be written as a sum of positive squares in only one way, i.e., 858548601 + 265005841 = 29301^2 + 16279^2 .

It is not an unprimeable number, because it can be changed into a prime (1123554449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280888609 + ... + 280888612.

Almost surely, 2^1123554442 is an apocalyptic number.

1123554442 is a deficient number, since it is larger than the sum of its proper divisors (561777224).

1123554442 is an equidigital number, since it uses as much as digits as its factorization.

1123554442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561777223.

The product of its digits is 19200, while the sum is 31.

The square root of 1123554442 is about 33519.4636293602. The cubic root of 1123554442 is about 1039.5962566194.

The spelling of 1123554442 in words is "one billion, one hundred twenty-three million, five hundred fifty-four thousand, four hundred forty-two".