12645506 has 4 divisors (see below), whose sum is σ = 18968262. Its totient is φ = 6322752.

The previous prime is 12645499. The next prime is 12645509. The reversal of 12645506 is 60554621.

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

It can be written as a sum of positive squares in only one way, i.e., 10660225 + 1985281 = 3265^2 + 1409^2 .

It is not an unprimeable number, because it can be changed into a prime (12645509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3161375 + ... + 3161378.

Almost surely, 2^12645506 is an apocalyptic number.

12645506 is a deficient number, since it is larger than the sum of its proper divisors (6322756).

12645506 is an equidigital number, since it uses as much as digits as its factorization.

12645506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322755.

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

The square root of 12645506 is about 3556.0520243663. The cubic root of 12645506 is about 232.9764753644.

The spelling of 12645506 in words is "twelve million, six hundred forty-five thousand, five hundred six".