12420869 has 4 divisors (see below), whose sum is σ = 12427980. Its totient is φ = 12413760.

The previous prime is 12420853. The next prime is 12420871. The reversal of 12420869 is 96802421.

12420869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5943844 + 6477025 = 2438^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420869 - 2⁴ = 12420853 is a prime.

It is a super-2 number, since 2×12420869² = 308555973430322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420839) 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, 1079 + ... + 5099.

It is an arithmetic number, because the mean of its divisors is an integer number (3106995).

Almost surely, 2^12420869 is an apocalyptic number.

It is an amenable number.

12420869 is a deficient number, since it is larger than the sum of its proper divisors (7111).

12420869 is an equidigital number, since it uses as much as digits as its factorization.

12420869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110.

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

The square root of 12420869 is about 3524.3253255056. The cubic root of 12420869 is about 231.5886798786.

The spelling of 12420869 in words is "twelve million, four hundred twenty thousand, eight hundred sixty-nine".