1212730018 has 8 divisors (see below), whose sum is σ = 1820832300. Its totient is φ = 605785920.

The previous prime is 1212729983. The next prime is 1212730031. The reversal of 1212730018 is 8100372121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 822943969 + 389786049 = 28687^2 + 19743^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1212729974 and 1212730001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286923 + ... + 291118.

Almost surely, 2^1212730018 is an apocalyptic number.

1212730018 is a deficient number, since it is larger than the sum of its proper divisors (608102282).

1212730018 is a wasteful number, since it uses less digits than its factorization.

1212730018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579092.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1212730018 is about 34824.2734023267. The cubic root of 1212730018 is about 1066.4030434238.

The spelling of 1212730018 in words is "one billion, two hundred twelve million, seven hundred thirty thousand, eighteen".