12820479 has 16 divisors (see below), whose sum is σ = 19805952. Its totient is φ = 7224768.

The previous prime is 12820427. The next prime is 12820481. The reversal of 12820479 is 97402821.

It is a happy number.

It is not a de Polignac number, because 12820479 - 2⁷ = 12820351 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820679) 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, 2649 + ... + 5714.

It is an arithmetic number, because the mean of its divisors is an integer number (1237872).

Almost surely, 2^12820479 is an apocalyptic number.

12820479 is a deficient number, since it is larger than the sum of its proper divisors (6985473).

12820479 is an equidigital number, since it uses as much as digits as its factorization.

12820479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8446.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 12820479 is about 3580.5696474165. The cubic root of 12820479 is about 234.0461045834.

The spelling of 12820479 in words is "twelve million, eight hundred twenty thousand, four hundred seventy-nine".