12932821 has 4 divisors (see below), whose sum is σ = 14108544. Its totient is φ = 11757100.

The previous prime is 12932819. The next prime is 12932833. The reversal of 12932821 is 12823921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12932821 - 2¹ = 12932819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12932821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12932891) 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 3 ways as a sum of consecutive naturals, for example, 587845 + ... + 587866.

It is an arithmetic number, because the mean of its divisors is an integer number (3527136).

Almost surely, 2^12932821 is an apocalyptic number.

12932821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12932821 is a deficient number, since it is larger than the sum of its proper divisors (1175723).

12932821 is a wasteful number, since it uses less digits than its factorization.

12932821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175722.

The product of its digits is 1728, while the sum is 28.

The square root of 12932821 is about 3596.2231577031. The cubic root of 12932821 is about 234.7277426450.

Subtracting from 12932821 its reverse (12823921), we obtain a square (108900 = 330²).

It can be divided in two parts, 1293 and 2821, that added together give a palindrome (4114).

The spelling of 12932821 in words is "twelve million, nine hundred thirty-two thousand, eight hundred twenty-one".