12478811 has 4 divisors (see below), whose sum is σ = 13021392. Its totient is φ = 11936232.

The previous prime is 12478793. The next prime is 12478813. The reversal of 12478811 is 11887421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12478811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12478813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271256 + ... + 271301.

It is an arithmetic number, because the mean of its divisors is an integer number (3255348).

Almost surely, 2^12478811 is an apocalyptic number.

12478811 is a deficient number, since it is larger than the sum of its proper divisors (542581).

12478811 is an equidigital number, since it uses as much as digits as its factorization.

12478811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542580.

The product of its digits is 3584, while the sum is 32.

The square root of 12478811 is about 3532.5360578485. The cubic root of 12478811 is about 231.9482333470.

The spelling of 12478811 in words is "twelve million, four hundred seventy-eight thousand, eight hundred eleven".