12771441 has 12 divisors (see below), whose sum is σ = 18486468. Its totient is φ = 8496384.

The previous prime is 12771431. The next prime is 12771457. The reversal of 12771441 is 14417721.

It can be written as a sum of positive squares in 2 ways, for example, as 3186225 + 9585216 = 1785^2 + 3096^2 .

It is not a de Polignac number, because 12771441 - 2¹⁵ = 12738673 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12771431) 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, 4141 + ... + 6533.

It is an arithmetic number, because the mean of its divisors is an integer number (1540539).

Almost surely, 2^12771441 is an apocalyptic number.

It is an amenable number.

12771441 is a deficient number, since it is larger than the sum of its proper divisors (5715027).

12771441 is a wasteful number, since it uses less digits than its factorization.

12771441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992 (or 2989 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 12771441 is about 3573.7152936405. The cubic root of 12771441 is about 233.7473165448.

The spelling of 12771441 in words is "twelve million, seven hundred seventy-one thousand, four hundred forty-one".