12390706 has 4 divisors (see below), whose sum is σ = 18586062. Its totient is φ = 6195352.

The previous prime is 12390701. The next prime is 12390727. The reversal of 12390706 is 60709321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60709321 = 5669 ⋅10709.

It can be written as a sum of positive squares in only one way, i.e., 7789681 + 4601025 = 2791^2 + 2145^2 .

It is not an unprimeable number, because it can be changed into a prime (12390701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3097675 + ... + 3097678.

Almost surely, 2^12390706 is an apocalyptic number.

12390706 is a deficient number, since it is larger than the sum of its proper divisors (6195356).

12390706 is an equidigital number, since it uses as much as digits as its factorization.

12390706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6195355.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 12390706 is about 3520.0434656407. The cubic root of 12390706 is about 231.4010636048.

The spelling of 12390706 in words is "twelve million, three hundred ninety thousand, seven hundred six".