12821877 has 12 divisors (see below), whose sum is σ = 18558540. Its totient is φ = 8530368.

The previous prime is 12821843. The next prime is 12821891. The reversal of 12821877 is 77812821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4835601 + 7986276 = 2199^2 + 2826^2 .

It is not a de Polignac number, because 12821877 - 2¹⁰ = 12820853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4399 + ... + 6707.

It is an arithmetic number, because the mean of its divisors is an integer number (1546545).

Almost surely, 2^12821877 is an apocalyptic number.

It is an amenable number.

12821877 is a deficient number, since it is larger than the sum of its proper divisors (5736663).

12821877 is a wasteful number, since it uses less digits than its factorization.

12821877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2932 (or 2929 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 12821877 is about 3580.7648624281. The cubic root of 12821877 is about 234.0546114045.

The spelling of 12821877 in words is "twelve million, eight hundred twenty-one thousand, eight hundred seventy-seven".