12605506 has 4 divisors (see below), whose sum is σ = 18908262. Its totient is φ = 6302752.

The previous prime is 12605503. The next prime is 12605519. The reversal of 12605506 is 60550621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60550621 = 3209 ⋅18869.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 3272481 = 3055^2 + 1809^2 .

It is not an unprimeable number, because it can be changed into a prime (12605503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3151375 + ... + 3151378.

Almost surely, 2^12605506 is an apocalyptic number.

12605506 is a deficient number, since it is larger than the sum of its proper divisors (6302756).

12605506 is an equidigital number, since it uses as much as digits as its factorization.

12605506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6302755.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 12605506 is about 3550.4233550381. The cubic root of 12605506 is about 232.7305671272.

The spelling of 12605506 in words is "twelve million, six hundred five thousand, five hundred six".