12720587 has 16 divisors (see below), whose sum is σ = 14625792. Its totient is φ = 10950720.

The previous prime is 12720581. The next prime is 12720593. The reversal of 12720587 is 78502721.

It is an interprime number because it is at equal distance from previous prime (12720581) and next prime (12720593).

It is not a de Polignac number, because 12720587 - 2¹⁶ = 12655051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12720581) 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 15 ways as a sum of consecutive naturals, for example, 34478 + ... + 34844.

It is an arithmetic number, because the mean of its divisors is an integer number (914112).

Almost surely, 2^12720587 is an apocalyptic number.

12720587 is a deficient number, since it is larger than the sum of its proper divisors (1905205).

12720587 is a wasteful number, since it uses less digits than its factorization.

12720587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 12720587 is about 3566.5931923896. The cubic root of 12720587 is about 233.4366546955.

The spelling of 12720587 in words is "twelve million, seven hundred twenty thousand, five hundred eighty-seven".