12078715 has 8 divisors (see below), whose sum is σ = 15812208. Its totient is φ = 8784480.

The previous prime is 12078709. The next prime is 12078719. The reversal of 12078715 is 51787021.

It is a happy number.

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

It is not a de Polignac number, because 12078715 - 2⁹ = 12078203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12078719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109752 + ... + 109861.

It is an arithmetic number, because the mean of its divisors is an integer number (1976526).

Almost surely, 2^12078715 is an apocalyptic number.

12078715 is a deficient number, since it is larger than the sum of its proper divisors (3733493).

12078715 is a wasteful number, since it uses less digits than its factorization.

12078715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219629.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 12078715 is about 3475.4445758780. Note that the first 3 decimals coincide. The cubic root of 12078715 is about 229.4423478262.

The spelling of 12078715 in words is "twelve million, seventy-eight thousand, seven hundred fifteen".