12783545 has 8 divisors (see below), whose sum is σ = 15407496. Its totient is φ = 10182016.

The previous prime is 12783503. The next prime is 12783557. The reversal of 12783545 is 54538721.

It is a happy number.

12783545 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 477481 + 12306064 = 691^2 + 3508^2 .

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 12783545 - 2¹² = 12779449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4322 + ... + 6651.

It is an arithmetic number, because the mean of its divisors is an integer number (1925937).

Almost surely, 2^12783545 is an apocalyptic number.

It is an amenable number.

12783545 is a deficient number, since it is larger than the sum of its proper divisors (2623951).

12783545 is a wasteful number, since it uses less digits than its factorization.

12783545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11211.

The product of its digits is 33600, while the sum is 35.

The square root of 12783545 is about 3575.4083682847. The cubic root of 12783545 is about 233.8211370893.

It can be divided in two parts, 127835 and 45, that multiplied together give a palindrome (5752575).

The spelling of 12783545 in words is "twelve million, seven hundred eighty-three thousand, five hundred forty-five".