12356545 has 4 divisors (see below), whose sum is σ = 14827860. Its totient is φ = 9885232.

The previous prime is 12356503. The next prime is 12356551. The reversal of 12356545 is 54565321.

12356545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4870849 + 7485696 = 2207^2 + 2736^2 .

It is a cyclic number.

It is not a de Polignac number, because 12356545 - 2⁷ = 12356417 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 1235650 + ... + 1235659.

It is an arithmetic number, because the mean of its divisors is an integer number (3706965).

Almost surely, 2^12356545 is an apocalyptic number.

It is an amenable number.

12356545 is a deficient number, since it is larger than the sum of its proper divisors (2471315).

12356545 is an equidigital number, since it uses as much as digits as its factorization.

12356545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471314.

The product of its digits is 18000, while the sum is 31.

The square root of 12356545 is about 3515.1877616992. The cubic root of 12356545 is about 231.1882113955.

The spelling of 12356545 in words is "twelve million, three hundred fifty-six thousand, five hundred forty-five".