12724581 has 8 divisors (see below), whose sum is σ = 16997824. Its totient is φ = 8467200.

The previous prime is 12724567. The next prime is 12724583. The reversal of 12724581 is 18542721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12724581 - 2¹⁵ = 12691813 is a prime.

It is a super-2 number, since 2×12724581² = 323829923251122, 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 (12724583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1945 + ... + 5406.

It is an arithmetic number, because the mean of its divisors is an integer number (2124728).

Almost surely, 2^12724581 is an apocalyptic number.

It is an amenable number.

12724581 is a deficient number, since it is larger than the sum of its proper divisors (4273243).

12724581 is an equidigital number, since it uses as much as digits as its factorization.

12724581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7931.

The product of its digits is 4480, while the sum is 30.

The square root of 12724581 is about 3567.1530665224. The cubic root of 12724581 is about 233.4610835586.

The spelling of 12724581 in words is "twelve million, seven hundred twenty-four thousand, five hundred eighty-one".