12771534 has 16 divisors (see below), whose sum is σ = 26887680. Its totient is φ = 4033080.

The previous prime is 12771533. The next prime is 12771547. The reversal of 12771534 is 43517721.

It is a super-2 number, since 2×12771534² = 326224161426312, which contains 22 as substring.

It is a Curzon number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55902 + ... + 56129.

It is an arithmetic number, because the mean of its divisors is an integer number (1680480).

Almost surely, 2^12771534 is an apocalyptic number.

12771534 is an abundant number, since it is smaller than the sum of its proper divisors (14116146).

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

12771534 is a wasteful number, since it uses less digits than its factorization.

12771534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112055.

The product of its digits is 5880, while the sum is 30.

The square root of 12771534 is about 3573.7283052857. The cubic root of 12771534 is about 233.7478839161.

The spelling of 12771534 in words is "twelve million, seven hundred seventy-one thousand, five hundred thirty-four".