12809545 has 16 divisors (see below), whose sum is σ = 17700480. Its totient is φ = 8717184.

The previous prime is 12809539. The next prime is 12809557. The reversal of 12809545 is 54590821.

12809545 = T₁₀₉₄ + T₁₀₉₅ + ... + T₁₁₁₄.

12809545 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12809545 - 2⁵ = 12809513 is a prime.

It is a super-3 number, since 3×12809545³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12809545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3549 + ... + 6181.

It is an arithmetic number, because the mean of its divisors is an integer number (1106280).

Almost surely, 2^12809545 is an apocalyptic number.

It is an amenable number.

12809545 is a deficient number, since it is larger than the sum of its proper divisors (4890935).

12809545 is a wasteful number, since it uses less digits than its factorization.

12809545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 12809545 is about 3579.0424697117. The cubic root of 12809545 is about 233.9795499210.

The spelling of 12809545 in words is "twelve million, eight hundred nine thousand, five hundred forty-five".