12506557 has 8 divisors (see below), whose sum is σ = 14373632. Its totient is φ = 10659600.

The previous prime is 12506537. The next prime is 12506561. The reversal of 12506557 is 75560521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12506557 - 2¹⁵ = 12473789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12506537) 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, 3669 + ... + 6202.

It is an arithmetic number, because the mean of its divisors is an integer number (1796704).

Almost surely, 2^12506557 is an apocalyptic number.

It is an amenable number.

12506557 is a deficient number, since it is larger than the sum of its proper divisors (1867075).

12506557 is an equidigital number, since it uses as much as digits as its factorization.

12506557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10059.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 12506557 is about 3536.4610841914. The cubic root of 12506557 is about 232.1200144512.

The spelling of 12506557 in words is "twelve million, five hundred six thousand, five hundred fifty-seven".