12987075 has 24 divisors (see below), whose sum is σ = 21976768. Its totient is φ = 6763680.

The previous prime is 12987071. The next prime is 12987077. The reversal of 12987075 is 57078921.

12987075 = T₂₂₁ + T₂₂₂ + ... + T₄₄₅.

It is not a de Polignac number, because 12987075 - 2² = 12987071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12987071) 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 23 ways as a sum of consecutive naturals, for example, 1212 + ... + 5238.

Almost surely, 2^12987075 is an apocalyptic number.

12987075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12987075 is a deficient number, since it is larger than the sum of its proper divisors (8989693).

12987075 is a wasteful number, since it uses less digits than its factorization.

12987075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083 (or 4078 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 12987075 is about 3603.7584547247. The cubic root of 12987075 is about 235.0555172893.

The spelling of 12987075 in words is "twelve million, nine hundred eighty-seven thousand, seventy-five".