12078613 has 4 divisors (see below), whose sum is σ = 12405100. Its totient is φ = 11752128.

The previous prime is 12078581. The next prime is 12078629. The reversal of 12078613 is 31687021.

12078613 = 2457² + 2458².

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 6041764 + 6036849 = 2458^2 + 2457^2 .

It is a cyclic number.

It is not a de Polignac number, because 12078613 - 2⁵ = 12078581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12078643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 163188 + ... + 163261.

It is an arithmetic number, because the mean of its divisors is an integer number (3101275).

Almost surely, 2^12078613 is an apocalyptic number.

12078613 is the 2458-th centered square number.

It is an amenable number.

12078613 is a deficient number, since it is larger than the sum of its proper divisors (326487).

12078613 is an equidigital number, since it uses as much as digits as its factorization.

12078613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326486.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 12078613 is about 3475.4299014654. The cubic root of 12078613 is about 229.4417019742.

The spelling of 12078613 in words is "twelve million, seventy-eight thousand, six hundred thirteen".