12724819 has 4 divisors (see below), whose sum is σ = 13278096. Its totient is φ = 12171544.

The previous prime is 12724807. The next prime is 12724853. The reversal of 12724819 is 91842721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12724819 - 2¹¹ = 12722771 is a prime.

It is a super-2 number, since 2×12724819² = 323842037165522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12724879) 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, 276604 + ... + 276649.

It is an arithmetic number, because the mean of its divisors is an integer number (3319524).

Almost surely, 2^12724819 is an apocalyptic number.

12724819 is a deficient number, since it is larger than the sum of its proper divisors (553277).

12724819 is an equidigital number, since it uses as much as digits as its factorization.

12724819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553276.

The product of its digits is 8064, while the sum is 34.

The square root of 12724819 is about 3567.1864263029. The cubic root of 12724819 is about 233.4625390981.

The spelling of 12724819 in words is "twelve million, seven hundred twenty-four thousand, eight hundred nineteen".