12147718 has 16 divisors (see below), whose sum is σ = 20010384. Its totient is φ = 5484960.

The previous prime is 12147713. The next prime is 12147727. The reversal of 12147718 is 81774121.

It is a self number, because there is not a number n which added to its sum of digits gives 12147718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12147713) 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, 1696 + ... + 5212.

It is an arithmetic number, because the mean of its divisors is an integer number (1250649).

Almost surely, 2^12147718 is an apocalyptic number.

12147718 is a deficient number, since it is larger than the sum of its proper divisors (7862666).

12147718 is a wasteful number, since it uses less digits than its factorization.

12147718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687.

The product of its digits is 3136, while the sum is 31.

The square root of 12147718 is about 3485.3576574005. The cubic root of 12147718 is about 229.8784360751.

The spelling of 12147718 in words is "twelve million, one hundred forty-seven thousand, seven hundred eighteen".