12486781 has 8 divisors (see below), whose sum is σ = 13194720. Its totient is φ = 11783952.

The previous prime is 12486779. The next prime is 12486811. The reversal of 12486781 is 18768421.

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

It is not a de Polignac number, because 12486781 - 2¹ = 12486779 is a prime.

It is a super-2 number, since 2×12486781² = 311839399483922, which contains 22 as substring.

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 12486781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12486751) 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, 4446 + ... + 6688.

It is an arithmetic number, because the mean of its divisors is an integer number (1649340).

Almost surely, 2^12486781 is an apocalyptic number.

It is an amenable number.

12486781 is a deficient number, since it is larger than the sum of its proper divisors (707939).

12486781 is a wasteful number, since it uses less digits than its factorization.

12486781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555.

The product of its digits is 21504, while the sum is 37.

The square root of 12486781 is about 3533.6639625182. The cubic root of 12486781 is about 231.9976032749.

The spelling of 12486781 in words is "twelve million, four hundred eighty-six thousand, seven hundred eighty-one".