1243123066 has 8 divisors (see below), whose sum is σ = 1864841364. Its totient is φ = 621509280.

The previous prime is 1243123027. The next prime is 1243123073. The reversal of 1243123066 is 6603213421.

It can be written as a sum of positive squares in 2 ways, for example, as 1220035041 + 23088025 = 34929^2 + 4805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19656 + ... + 53596.

Almost surely, 2^1243123066 is an apocalyptic number.

1243123066 is a deficient number, since it is larger than the sum of its proper divisors (621718298).

1243123066 is a wasteful number, since it uses less digits than its factorization.

1243123066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52256.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1243123066 is about 35257.9503942019. The cubic root of 1243123066 is about 1075.2382571955.

Adding to 1243123066 its reverse (6603213421), we get a palindrome (7846336487).

The spelling of 1243123066 in words is "one billion, two hundred forty-three million, one hundred twenty-three thousand, sixty-six".