12771536 has 10 divisors (see below), whose sum is σ = 24744882. Its totient is φ = 6385760.

The previous prime is 12771533. The next prime is 12771547. The reversal of 12771536 is 63517721.

It can be written as a sum of positive squares in only one way, i.e., 12559936 + 211600 = 3544^2 + 460^2 .

It is a super-2 number, since 2×12771536² = 326224263598592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12771533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399095 + ... + 399126.

Almost surely, 2^12771536 is an apocalyptic number.

12771536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12771536 is a deficient number, since it is larger than the sum of its proper divisors (11973346).

12771536 is an equidigital number, since it uses as much as digits as its factorization.

12771536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798229 (or 798223 counting only the distinct ones).

The product of its digits is 8820, while the sum is 32.

The square root of 12771536 is about 3573.7285851055. The cubic root of 12771536 is about 233.7478961176.

The spelling of 12771536 in words is "twelve million, seven hundred seventy-one thousand, five hundred thirty-six".