12775521 has 8 divisors (see below), whose sum is σ = 18582624. Its totient is φ = 7742720.

The previous prime is 12775519. The next prime is 12775537. The reversal of 12775521 is 12557721.

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

It is a cyclic number.

It is not a de Polignac number, because 12775521 - 2¹ = 12775519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12775421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193536 + ... + 193601.

It is an arithmetic number, because the mean of its divisors is an integer number (2322828).

Almost surely, 2^12775521 is an apocalyptic number.

12775521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12775521 is a deficient number, since it is larger than the sum of its proper divisors (5807103).

12775521 is a wasteful number, since it uses less digits than its factorization.

12775521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387151.

The product of its digits is 4900, while the sum is 30.

The square root of 12775521 is about 3574.2860825625. The cubic root of 12775521 is about 233.7722050836.

The spelling of 12775521 in words is "twelve million, seven hundred seventy-five thousand, five hundred twenty-one".