12001145 has 8 divisors (see below), whose sum is σ = 15509256. Its totient is φ = 8862336.

The previous prime is 12001139. The next prime is 12001153. The reversal of 12001145 is 54110021.

It can be written as a sum of positive squares in 4 ways, for example, as 1882384 + 10118761 = 1372^2 + 3181^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12001145 - 2⁶ = 12001081 is a prime.

It is a super-2 number, since 2×12001145² = 288054962622050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92252 + ... + 92381.

It is an arithmetic number, because the mean of its divisors is an integer number (1938657).

Almost surely, 2^12001145 is an apocalyptic number.

It is an amenable number.

12001145 is a deficient number, since it is larger than the sum of its proper divisors (3508111).

12001145 is a wasteful number, since it uses less digits than its factorization.

12001145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184651.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 12001145 is about 3464.2668777102. The cubic root of 12001145 is about 228.9501299336.

Adding to 12001145 its reverse (54110021), we get a palindrome (66111166).

The spelling of 12001145 in words is "twelve million, one thousand, one hundred forty-five".