12807145 has 8 divisors (see below), whose sum is σ = 16550856. Its totient is φ = 9457536.

The previous prime is 12807139. The next prime is 12807169. The reversal of 12807145 is 54170821.

It can be written as a sum of positive squares in 4 ways, for example, as 2483776 + 10323369 = 1576^2 + 3213^2 .

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 12807145 - 2¹⁷ = 12676073 is a prime.

It is a Duffinian 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, 98452 + ... + 98581.

It is an arithmetic number, because the mean of its divisors is an integer number (2068857).

Almost surely, 2^12807145 is an apocalyptic number.

It is an amenable number.

12807145 is a deficient number, since it is larger than the sum of its proper divisors (3743711).

12807145 is a wasteful number, since it uses less digits than its factorization.

12807145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197051.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 12807145 is about 3578.7071687971. The cubic root of 12807145 is about 233.9649361833.

Adding to 12807145 its reverse (54170821), we get a palindrome (66977966).

The spelling of 12807145 in words is "twelve million, eight hundred seven thousand, one hundred forty-five".