12290587 has 4 divisors (see below), whose sum is σ = 12937480. Its totient is φ = 11643696.

The previous prime is 12290573. The next prime is 12290617. The reversal of 12290587 is 78509221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12290587 - 2⁷ = 12290459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12290567) 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, 323418 + ... + 323455.

It is an arithmetic number, because the mean of its divisors is an integer number (3234370).

Almost surely, 2^12290587 is an apocalyptic number.

12290587 is a deficient number, since it is larger than the sum of its proper divisors (646893).

12290587 is an equidigital number, since it uses as much as digits as its factorization.

12290587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646892.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 12290587 is about 3505.7933481596. The cubic root of 12290587 is about 230.7761241217.

It can be divided in two parts, 122 and 90587, that added together give a palindrome (90709).

The spelling of 12290587 in words is "twelve million, two hundred ninety thousand, five hundred eighty-seven".