12071665 has 8 divisors (see below), whose sum is σ = 15115968. Its totient is φ = 9237360.

The previous prime is 12071663. The next prime is 12071681. The reversal of 12071665 is 56617021.

12071665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12071665 - 2¹ = 12071663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12071663) 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, 52371 + ... + 52600.

It is an arithmetic number, because the mean of its divisors is an integer number (1889496).

Almost surely, 2^12071665 is an apocalyptic number.

It is an amenable number.

12071665 is a deficient number, since it is larger than the sum of its proper divisors (3044303).

12071665 is a wasteful number, since it uses less digits than its factorization.

12071665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104999.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12071665 is about 3474.4301691069. The cubic root of 12071665 is about 229.3976994961.

Adding to 12071665 its reverse (56617021), we get a palindrome (68688686).

The spelling of 12071665 in words is "twelve million, seventy-one thousand, six hundred sixty-five".