12987533 has 8 divisors (see below), whose sum is σ = 14184576. Its totient is φ = 11818800.

The previous prime is 12987523. The next prime is 12987547. The reversal of 12987533 is 33578921.

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 12987533 - 2¹⁰ = 12986509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987523) 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, 6113 + ... + 7958.

It is an arithmetic number, because the mean of its divisors is an integer number (1773072).

Almost surely, 2^12987533 is an apocalyptic number.

12987533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12987533 is a deficient number, since it is larger than the sum of its proper divisors (1197043).

12987533 is a wasteful number, since it uses less digits than its factorization.

12987533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14155.

The product of its digits is 45360, while the sum is 38.

The square root of 12987533 is about 3603.8219989339. The cubic root of 12987533 is about 235.0582803996.

The spelling of 12987533 in words is "twelve million, nine hundred eighty-seven thousand, five hundred thirty-three".