12820469 has 4 divisors (see below), whose sum is σ = 12844044. Its totient is φ = 12796896.

The previous prime is 12820427. The next prime is 12820481. The reversal of 12820469 is 96402821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96402821 = 23 ⋅4191427.

It can be written as a sum of positive squares in 2 ways, for example, as 3591025 + 9229444 = 1895^2 + 3038^2 .

It is a cyclic number.

It is not a de Polignac number, because 12820469 - 2¹² = 12816373 is a prime.

It is a super-2 number, since 2×12820469² = 328728850759922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820369) 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, 10952 + ... + 12065.

It is an arithmetic number, because the mean of its divisors is an integer number (3211011).

Almost surely, 2^12820469 is an apocalyptic number.

It is an amenable number.

12820469 is a deficient number, since it is larger than the sum of its proper divisors (23575).

12820469 is an equidigital number, since it uses as much as digits as its factorization.

12820469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23574.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 12820469 is about 3580.5682509903. The cubic root of 12820469 is about 234.0460437312.

The spelling of 12820469 in words is "twelve million, eight hundred twenty thousand, four hundred sixty-nine".