12288545 has 4 divisors (see below), whose sum is σ = 14746260. Its totient is φ = 9830832.

The previous prime is 12288539. The next prime is 12288553. The reversal of 12288545 is 54588221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3621409 + 8667136 = 1903^2 + 2944^2 .

It is a cyclic number.

It is not a de Polignac number, because 12288545 - 2¹⁶ = 12223009 is a prime.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228850 + ... + 1228859.

It is an arithmetic number, because the mean of its divisors is an integer number (3686565).

Almost surely, 2^12288545 is an apocalyptic number.

It is an amenable number.

12288545 is a deficient number, since it is larger than the sum of its proper divisors (2457715).

12288545 is an equidigital number, since it uses as much as digits as its factorization.

12288545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457714.

The product of its digits is 25600, while the sum is 35.

The square root of 12288545 is about 3505.5021038362. The cubic root of 12288545 is about 230.7633427700.

The spelling of 12288545 in words is "twelve million, two hundred eighty-eight thousand, five hundred forty-five".