12687553 has 4 divisors (see below), whose sum is σ = 12695728. Its totient is φ = 12679380.

The previous prime is 12687551. The next prime is 12687583. The reversal of 12687553 is 35578621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12687553 - 2¹ = 12687551 is a prime.

It is a super-2 number, since 2×12687553² = 321948002255618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12687551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963 + ... + 5128.

It is an arithmetic number, because the mean of its divisors is an integer number (3173932).

Almost surely, 2^12687553 is an apocalyptic number.

It is an amenable number.

12687553 is a deficient number, since it is larger than the sum of its proper divisors (8175).

12687553 is an equidigital number, since it uses as much as digits as its factorization.

12687553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8174.

The product of its digits is 50400, while the sum is 37.

The square root of 12687553 is about 3561.9591519275. The cubic root of 12687553 is about 233.2344095402.

The spelling of 12687553 in words is "twelve million, six hundred eighty-seven thousand, five hundred fifty-three".