1123165642 has 4 divisors (see below), whose sum is σ = 1684748466. Its totient is φ = 561582820.

The previous prime is 1123165613. The next prime is 1123165643. The reversal of 1123165642 is 2465613211.

It is a happy number.

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., 865595241 + 257570401 = 29421^2 + 16049^2 .

It is not an unprimeable number, because it can be changed into a prime (1123165643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280791409 + ... + 280791412.

Almost surely, 2^1123165642 is an apocalyptic number.

1123165642 is a deficient number, since it is larger than the sum of its proper divisors (561582824).

1123165642 is an equidigital number, since it uses as much as digits as its factorization.

1123165642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561582823.

The product of its digits is 8640, while the sum is 31.

The square root of 1123165642 is about 33513.6635120662. The cubic root of 1123165642 is about 1039.4763272116.

Adding to 1123165642 its reverse (2465613211), we get a palindrome (3588778853).

The spelling of 1123165642 in words is "one billion, one hundred twenty-three million, one hundred sixty-five thousand, six hundred forty-two".