12775538 has 8 divisors (see below), whose sum is σ = 19213740. Its totient is φ = 6370960.

The previous prime is 12775537. The next prime is 12775547. The reversal of 12775538 is 83557721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10029889 + 2745649 = 3167^2 + 1657^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12775537) 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 3 ways as a sum of consecutive naturals, for example, 7433 + ... + 8988.

Almost surely, 2^12775538 is an apocalyptic number.

12775538 is a deficient number, since it is larger than the sum of its proper divisors (6438202).

12775538 is a wasteful number, since it uses less digits than its factorization.

12775538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16812.

The product of its digits is 58800, while the sum is 38.

The square root of 12775538 is about 3574.2884606590. The cubic root of 12775538 is about 233.7723087748.

The spelling of 12775538 in words is "twelve million, seven hundred seventy-five thousand, five hundred thirty-eight".