12812481 has 12 divisors (see below), whose sum is σ = 20189520. Its totient is φ = 7765080.

The previous prime is 12812473. The next prime is 12812489. The reversal of 12812481 is 18421821.

It is an interprime number because it is at equal distance from previous prime (12812473) and next prime (12812489).

It is not a de Polignac number, because 12812481 - 2³ = 12812473 is a prime.

It is a super-2 number, since 2×12812481² = 328319338750722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12812489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64611 + ... + 64808.

It is an arithmetic number, because the mean of its divisors is an integer number (1682460).

Almost surely, 2^12812481 is an apocalyptic number.

12812481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12812481 is a deficient number, since it is larger than the sum of its proper divisors (7377039).

12812481 is a wasteful number, since it uses less digits than its factorization.

12812481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129436 (or 129433 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 12812481 is about 3579.4526117830. The cubic root of 12812481 is about 233.9974249114.

The spelling of 12812481 in words is "twelve million, eight hundred twelve thousand, four hundred eighty-one".