1218127472 has 20 divisors (see below), whose sum is σ = 2462736720. Its totient is φ = 582582528.

The previous prime is 1218127451. The next prime is 1218127481. The reversal of 1218127472 is 2747218121.

It is a happy number.

It is a super-2 number, since 2×1218127472² = 2967669076082221568, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1654697 + ... + 1655432.

It is an arithmetic number, because the mean of its divisors is an integer number (123136836).

Almost surely, 2^1218127472 is an apocalyptic number.

It is an amenable number.

1218127472 is an abundant number, since it is smaller than the sum of its proper divisors (1244609248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218127472 is a wasteful number, since it uses less digits than its factorization.

1218127472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310160 (or 3310154 counting only the distinct ones).

The product of its digits is 12544, while the sum is 35.

The square root of 1218127472 is about 34901.6829393655. The cubic root of 1218127472 is about 1067.9827693873.

The spelling of 1218127472 in words is "one billion, two hundred eighteen million, one hundred twenty-seven thousand, four hundred seventy-two".