12813545 has 8 divisors (see below), whose sum is σ = 15666696. Its totient is φ = 10057216.

The previous prime is 12813523. The next prime is 12813557. The reversal of 12813545 is 54531821.

It can be written as a sum of positive squares in 4 ways, for example, as 310249 + 12503296 = 557^2 + 3536^2 .

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 12813545 - 2²² = 8619241 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23912 + ... + 24441.

It is an arithmetic number, because the mean of its divisors is an integer number (1958337).

Almost surely, 2^12813545 is an apocalyptic number.

It is an amenable number.

12813545 is a deficient number, since it is larger than the sum of its proper divisors (2853151).

12813545 is an equidigital number, since it uses as much as digits as its factorization.

12813545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48411.

The product of its digits is 4800, while the sum is 29.

The square root of 12813545 is about 3579.6012347746. The cubic root of 12813545 is about 234.0039020948.

The spelling of 12813545 in words is "twelve million, eight hundred thirteen thousand, five hundred forty-five".