12771486 has 128 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 3193344.

The previous prime is 12771481. The next prime is 12771487. The reversal of 12771486 is 68417721.

It is a super-2 number, since 2×12771486² = 326221709296392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12771486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12771481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112966 + ... + 113078.

It is an arithmetic number, because the mean of its divisors is an integer number (287280).

Almost surely, 2^12771486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12771486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18385920).

12771486 is an abundant number, since it is smaller than the sum of its proper divisors (24000354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12771486 is a wasteful number, since it uses less digits than its factorization.

12771486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 161 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 12771486 is about 3573.7215896038. The cubic root of 12771486 is about 233.7475910797.

The spelling of 12771486 in words is "twelve million, seven hundred seventy-one thousand, four hundred eighty-six".