12473821 has 4 divisors (see below), whose sum is σ = 12624192. Its totient is φ = 12323452.

The previous prime is 12473789. The next prime is 12473849. The reversal of 12473821 is 12837421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12837421 = 79 ⋅162499.

It is a cyclic number.

It is not a de Polignac number, because 12473821 - 2⁵ = 12473789 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 12473821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12473891) 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, 75061 + ... + 75226.

It is an arithmetic number, because the mean of its divisors is an integer number (3156048).

Almost surely, 2^12473821 is an apocalyptic number.

It is an amenable number.

12473821 is a deficient number, since it is larger than the sum of its proper divisors (150371).

12473821 is an equidigital number, since it uses as much as digits as its factorization.

12473821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150370.

The product of its digits is 2688, while the sum is 28.

The square root of 12473821 is about 3531.8296957809. The cubic root of 12473821 is about 231.9173122388.

The spelling of 12473821 in words is "twelve million, four hundred seventy-three thousand, eight hundred twenty-one".