12078813 has 16 divisors (see below), whose sum is σ = 17150400. Its totient is φ = 7539840.

The previous prime is 12078791. The next prime is 12078853. The reversal of 12078813 is 31887021.

It is a happy number.

It is not a de Polignac number, because 12078813 - 2¹⁰ = 12077789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12078853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3883 + ... + 6263.

It is an arithmetic number, because the mean of its divisors is an integer number (1071900).

Almost surely, 2^12078813 is an apocalyptic number.

It is an amenable number.

12078813 is a deficient number, since it is larger than the sum of its proper divisors (5071587).

12078813 is a wasteful number, since it uses less digits than its factorization.

12078813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 12078813 is about 3475.4586747651. The cubic root of 12078813 is about 229.4429683472.

The spelling of 12078813 in words is "twelve million, seventy-eight thousand, eight hundred thirteen".