12424781 has 4 divisors (see below), whose sum is σ = 12451200. Its totient is φ = 12398364.

The previous prime is 12424777. The next prime is 12424799. The reversal of 12424781 is 18742421.

12424781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12424781 - 2² = 12424777 is a prime.

It is a super-2 number, since 2×12424781² = 308750365795922, 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 (12424771) 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, 12491 + ... + 13448.

It is an arithmetic number, because the mean of its divisors is an integer number (3112800).

Almost surely, 2^12424781 is an apocalyptic number.

It is an amenable number.

12424781 is a deficient number, since it is larger than the sum of its proper divisors (26419).

12424781 is an equidigital number, since it uses as much as digits as its factorization.

12424781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26418.

The product of its digits is 3584, while the sum is 29.

The square root of 12424781 is about 3524.8802816550. The cubic root of 12424781 is about 231.6129905721.

The spelling of 12424781 in words is "twelve million, four hundred twenty-four thousand, seven hundred eighty-one".