1212679660 has 24 divisors (see below), whose sum is σ = 2634443280. Its totient is φ = 468345024.

The previous prime is 1212679639. The next prime is 1212679661. The reversal of 1212679660 is 669762121.

It is not an unprimeable number, because it can be changed into a prime (1212679661) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1044834 + ... + 1045993.

It is an arithmetic number, because the mean of its divisors is an integer number (109768470).

Almost surely, 2^1212679660 is an apocalyptic number.

1212679660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212679660 is an abundant number, since it is smaller than the sum of its proper divisors (1421763620).

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

1212679660 is a wasteful number, since it uses less digits than its factorization.

1212679660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090865 (or 2090863 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1212679660 is about 34823.5503646598. The cubic root of 1212679660 is about 1066.3882826040.

The spelling of 1212679660 in words is "one billion, two hundred twelve million, six hundred seventy-nine thousand, six hundred sixty".