12887533 has 4 divisors (see below), whose sum is σ = 13130748. Its totient is φ = 12644320.

The previous prime is 12887519. The next prime is 12887549. The reversal of 12887533 is 33578821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33578821 = 47 ⋅714443.

It can be written as a sum of positive squares in 2 ways, for example, as 5822569 + 7064964 = 2413^2 + 2658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12887533 is a prime.

It is a super-3 number, since 3×12887533³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12887492 and 12887501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121528 + ... + 121633.

It is an arithmetic number, because the mean of its divisors is an integer number (3282687).

Almost surely, 2^12887533 is an apocalyptic number.

It is an amenable number.

12887533 is a deficient number, since it is larger than the sum of its proper divisors (243215).

12887533 is an equidigital number, since it uses as much as digits as its factorization.

12887533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243214.

The product of its digits is 40320, while the sum is 37.

The square root of 12887533 is about 3589.9210297721. The cubic root of 12887533 is about 234.4534332576.

The spelling of 12887533 in words is "twelve million, eight hundred eighty-seven thousand, five hundred thirty-three".