12505646 has 4 divisors (see below), whose sum is σ = 18758472. Its totient is φ = 6252822.

The previous prime is 12505643. The next prime is 12505681. The reversal of 12505646 is 64650521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3126410 + ... + 3126413.

It is an arithmetic number, because the mean of its divisors is an integer number (4689618).

Almost surely, 2^12505646 is an apocalyptic number.

12505646 is a deficient number, since it is larger than the sum of its proper divisors (6252826).

12505646 is an equidigital number, since it uses as much as digits as its factorization.

12505646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252825.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 12505646 is about 3536.3322807677. The cubic root of 12505646 is about 232.1143783018.

The spelling of 12505646 in words is "twelve million, five hundred five thousand, six hundred forty-six".