12406642 has 8 divisors (see below), whose sum is σ = 18865116. Its totient is φ = 6118272.

The previous prime is 12406633. The next prime is 12406649. The reversal of 12406642 is 24660421.

It can be written as a sum of positive squares in 2 ways, for example, as 12047841 + 358801 = 3471^2 + 599^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12406649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42343 + ... + 42634.

Almost surely, 2^12406642 is an apocalyptic number.

12406642 is a deficient number, since it is larger than the sum of its proper divisors (6458474).

12406642 is an equidigital number, since it uses as much as digits as its factorization.

12406642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85052.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 12406642 is about 3522.3063466996. The cubic root of 12406642 is about 231.5002246902.

The spelling of 12406642 in words is "twelve million, four hundred six thousand, six hundred forty-two".