12506551 has 8 divisors (see below), whose sum is σ = 12711600. Its totient is φ = 12303360.

The previous prime is 12506537. The next prime is 12506561. The reversal of 12506551 is 15560521.

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 12506551 - 2⁵ = 12506519 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 (12506561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19191 + ... + 19831.

It is an arithmetic number, because the mean of its divisors is an integer number (1588950).

Almost surely, 2^12506551 is an apocalyptic number.

12506551 is a deficient number, since it is larger than the sum of its proper divisors (205049).

12506551 is a wasteful number, since it uses less digits than its factorization.

12506551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 12506551 is about 3536.4602358856. The cubic root of 12506551 is about 232.1199773314.

The spelling of 12506551 in words is "twelve million, five hundred six thousand, five hundred fifty-one".